Protein is one of the main dietary macronutrients and is made up of amino acids. It contributes to maintaining and building muscle mass, tissue repair and many other normal bodily functions.

Protein supplements offer a convenient way to increase daily protein intake when food alone is insufficient or when a quick, practical option is needed.

There are many different forms of protein, including Whey Concentrate, Whey Isolate, Hydrolyzed Whey, Casein, Vegan Protein, Beef Protein and others. Each form has different characteristics, but this does not mean that one is always better than all the others.

What Is Protein and Why Does the Body Need It?

Protein is a key structural component of the human body. Muscles, skin, many enzymes and various other bodily structures contain proteins. During digestion, proteins from food are broken down into amino acids, which the body uses according to its needs.

Adequate protein intake is particularly important for people who exercise, because exercise provides a stimulus for muscle adaptation and recovery. Protein supplies the amino acids needed for muscle protein synthesis.

Protein powder is not an anabolic substance or a medicine. It is simply a concentrated source of dietary protein. Other protein sources include milk, yoghurt, eggs, meat, fish and pulses.

How Much Protein Do You Need Per Day?

Protein requirements are not the same for everyone. They depend on body weight, age, physical activity level, type of training, overall goals and diet.

For a healthy adult in the general population, the European Food Safety Authority (EFSA) has established a reference intake of approximately 0.83 grams of protein per kilogram of body weight per day. This primarily covers the body's basic needs and is not specifically intended to maximise athletic performance.

People who exercise regularly, particularly those who do resistance training, generally have higher requirements. The International Society of Sports Nutrition states that a daily intake of approximately 1.4–2.0 grams of protein per kilogram of body weight is sufficient for most people who exercise to support training adaptations and muscle mass.

Examples of Daily Protein Intake for People Who Exercise

Body Weight	1,4 g/kg	1,6 g/kg	2,0 g/kg
60 kg	84 g	96 g	120 g
70 kg	98 g	112 g	140 g
80 kg	112 g	128 g	160 g
90 kg	126 g	144 g	180 g
100 kg	140 g	160 g	200 g

The figures above are general examples, not personalised recommendations. Someone who weighs 80 kg, for example, does not necessarily need 160 g of protein. The appropriate amount depends on their activity level, goals and overall diet.

More protein does not mean endlessly better results. Beyond a certain point, increasing intake does not necessarily lead to greater muscle growth.

Daily protein intake can come from both regular foods and supplements. A protein shake does not need to provide most of your daily protein intake; it is mainly a convenient way to make up the amount that is difficult to obtain from your diet.

What Is Whey Protein?

Whey Protein is a protein derived from milk. Whey is the liquid portion that separates from casein during the production of cheese and other dairy products, although whey proteins can now also be produced through specialised milk filtration processes.

Whey contains proteins of high nutritional value and provides all the essential amino acids the body needs to obtain through food. It is particularly rich in BCAAs, especially leucine, an essential amino acid that plays an important role in muscle protein synthesis.

For this reason, Whey Protein is widely used in sports nutrition, but it is not exclusively intended for athletes. In practice, it offers an easy and convenient way to obtain protein when a person's daily diet does not readily meet their needs.

How Is Whey Protein Produced?

During cheese production, milk separates into two main parts: the more solid portion, which mainly contains casein, and the liquid portion, known as whey.

Liquid whey contains water, proteins, lactose, minerals and other components. To create a concentrated protein product, it undergoes filtration processes that separate the proteins from lactose, fats and other components to varying degrees.

Techniques such as ultrafiltration, microfiltration and diafiltration are used, depending on the product and the manufacturing process. After the proteins have been concentrated, the product is usually dried to turn it into a powder.

The degree of processing and filtration is one of the main reasons different whey categories exist. This produces products such as Whey Protein Concentrate (WPC) and Whey Protein Isolate (WPI), while additional hydrolysis can produce Hydrolyzed Whey Protein.

Whey Protein is not simply “powdered milk”. During production, its protein proportion is significantly increased, while other milk components are removed to varying degrees, depending on whether it is Concentrate, Isolate or another form.

In Brief

Whey = a protein derived from the liquid portion of milk.
It is a complete protein, contains all the essential amino acids, is digested relatively quickly and offers a convenient way to increase daily protein intake.

What Is Whey Protein Concentrate (WPC)?

Whey Protein Concentrate (WPC) is one of the most common forms of whey protein. It is produced by filtering whey to significantly increase the proportion of protein and remove some of the water, lactose and fats.

The term “Concentrate” does not mean low quality. It means that the product is concentrated whey protein, but it usually retains more lactose, carbohydrates and fats than Whey Isolate.

How Much Protein Does Whey Concentrate Contain?

The protein content of Whey Concentrate can vary depending on the degree of filtration and the raw ingredient used. Sports nutrition products very often contain WPC80, a raw ingredient containing approximately 80% protein on a dry-matter basis.

This does not mean that a finished flavoured product will necessarily list 80 g of protein per 100 g. Adding flavourings, sweeteners, cocoa or other ingredients can reduce the final proportion of protein in the product.

For this reason, the correct way to compare two protein products is to check the nutrition label, rather than relying only on the name “Whey Concentrate”.

What Else Does It Contain?

Compared with Whey Isolate, Concentrate usually retains higher amounts of:

• lactose,
• carbohydrates,
• fats,
• naturally occurring whey components.

The exact amounts vary from product to product, so we should not assume that all Whey Concentrate products have the same composition.

Who Is Whey Concentrate Suitable For?

Whey Concentrate is a good option for most people looking for a convenient way to increase their daily protein intake.

It usually offers a very good balance of quality, taste and price and can be used both by people who train with weights and by anyone who struggles to meet their protein needs through their daily diet.

Whey Concentrate and Lactose

Because Whey Concentrate retains more lactose than Whey Isolate, some people with lactose intolerance may experience bloating, gas or other digestive discomfort.

However, tolerance varies considerably from person to person. Someone with mild intolerance may tolerate a particular Whey Concentrate, while another person may prefer Whey Isolate or a different product with a lower lactose content.

Lactose intolerance is not the same as an allergy to milk proteins. In the case of a milk allergy, both Concentrate and Isolate may cause problems, and appropriate medical guidance is needed.

Is Whey Concentrate Worse Than Isolate?

No. Whey Isolate usually has a higher proportion of protein and lower amounts of lactose, carbohydrates and fats, but this does not mean that it will build more muscle mass on its own.

When total daily protein intake is sufficient, the difference between Concentrate and Isolate usually matters more in terms of nutritional composition, digestion, lactose, calories and price than in determining whether someone will build more muscle.

In Brief

Whey Concentrate = a complete whey protein offering very good quality for its cost.
It contains all the essential amino acids and usually slightly more lactose, carbohydrates and fats than Whey Isolate. For most healthy people who exercise, it is a perfectly suitable protein option.

What Is Whey Protein Isolate (WPI)?

Whey Protein Isolate (WPI) is a more extensively filtered form of whey protein. During production, more lactose, fats and carbohydrates are removed than with Whey Concentrate, resulting in a higher proportion of protein in the final product.

Its main difference from Concentrate is not that it is a “stronger” protein, but that it usually provides more protein per gram of product and smaller amounts of some other milk components.

What Does WPI90 Mean?

The term WPI90 usually refers to a Whey Protein Isolate raw ingredient containing approximately 90% protein on a dry-matter basis.

This does not mean that every finished flavoured Whey Isolate product will contain exactly 90 g of protein per 100 g. Flavourings, cocoa, sweeteners and other ingredients can reduce the final protein percentage.

For this reason, just as with Concentrate, we should always check the nutrition label of the actual product.

What Is the Main Difference Compared with Whey Concentrate?

In general, Whey Isolate usually has:

• a higher proportion of protein,
• less lactose,
• fewer carbohydrates,
• less fat,
• slightly fewer calories for an equivalent amount of product.

These differences can be smaller or larger depending on the specific product. For this reason, two protein products should not be compared solely by the word “Isolate” or “Concentrate”, but by their full labels.

Whey Isolate and Lactose

Because it undergoes more extensive filtration, Whey Isolate usually contains much less lactose than Whey Concentrate.

For this reason, many people with mild lactose intolerance may tolerate it better.

However, this does not mean that every Whey Isolate is necessarily completely lactose-free. Anyone who needs a genuinely lactose-free product should check the specific label and the manufacturer's information.

Also, as discussed in the Concentrate section, lactose intolerance is not the same as an allergy to milk proteins.

Who Is Whey Isolate Suitable For?

Whey Isolate can be a particularly convenient option for:

• people who want a higher proportion of protein per serving,
• those who want to minimise carbohydrates and fats,
• people who have difficulty tolerating lactose,
• those following a calorie-controlled diet,
• athletes who prefer a more extensively filtered whey product.

Is Whey Isolate Better for Getting Lean?

Not on its own. Whey Isolate usually contains slightly fewer calories, carbohydrates and fats than Concentrate, but body fat loss mainly depends on overall energy balance.

Therefore, Isolate may make it easier to follow a stricter dietary plan, but it is not a “fat-burning” protein.

Does It Build More Muscle Than Whey Concentrate?

Not necessarily. When two people consume enough total protein and comparable amounts of essential amino acids, the fact that one uses Isolate and the other Concentrate does not, by itself, mean that the first person will gain more muscle mass.

Total daily protein intake, training, calories, sleep and consistency matter more.

Is the Higher Price Worth It?

It depends on the person's needs. If someone tolerates Whey Concentrate well and does not particularly need to limit lactose, fats or carbohydrates, a quality Concentrate can be a perfectly adequate and more affordable option.

However, if lower lactose content, a higher proportion of protein or a “leaner” nutritional profile are important to that particular person, the additional cost of an Isolate may offer practical value.

Whey Concentrate or Whey Isolate?

Concentrate: usually more affordable, with very good protein quality and slightly more lactose, carbohydrates and fats.

Isolate: more extensively filtered, with a higher proportion of protein and usually less lactose, carbohydrates and fats.

For most people, both can be excellent protein sources. The best choice depends more on individual needs and tolerance than on which name sounds more “premium”.

In Brief

Whey Isolate = more extensively filtered whey with a high proportion of protein and usually much lower amounts of lactose, carbohydrates and fats.

It is a very good option when these characteristics have practical importance, but this does not mean it is necessarily the best choice for everyone.

What Is Hydrolyzed Whey Protein?

Hydrolyzed Whey Protein is whey protein that has undergone additional processing in which some of the protein chains are broken down into smaller peptides. This process is called hydrolysis.

In simple terms, the protein has undergone some of the breakdown that normally occurs during digestion, before it is even consumed.

What Does “Hydrolyzed” Mean?

The term Hydrolyzed means that large protein chains have been broken down into smaller fragments called peptides.

The degree of hydrolysis can vary considerably from product to product. For this reason, two products labelled “Hydrolyzed Whey” are not necessarily the same in terms of how extensively the protein has been hydrolysed.

Is It Digested and Absorbed Faster?

Because some of the protein has already been broken down into smaller peptides, Hydrolyzed Whey can be digested and absorbed quickly.

However, whey in general is already a fast-digesting protein. For this reason, in practice, the difference between a quality Hydrolyzed Whey and a regular Whey Isolate or Concentrate does not necessarily mean greater muscle growth.

Why Can It Taste More Bitter?

Hydrolysis creates smaller peptides, some of which can taste more bitter. For this reason, many Hydrolyzed Whey products have a stronger or slightly more bitter taste than a typical Whey Concentrate.

Manufacturers usually use flavourings and sweeteners to improve the taste of the final product.

Who Might It Be Suitable For?

• People who prefer a very fast-digesting protein
• Athletes who want a more extensively processed form of whey
• People who have difficulty tolerating certain other forms of protein
• Those who prefer products with a high degree of filtration and processing
• People who are comfortable with the usually higher cost

Hydrolyzed Whey and Lactose

Hydrolysis mainly affects the protein, not the lactose. Therefore, the fact that a product is Hydrolyzed does not automatically mean that it is lactose-free.

The actual lactose content depends on whether the raw ingredient is Concentrate, Isolate or another form, as well as on the overall manufacturing process.

Is It Better Than Whey Isolate?

Not necessarily. Hydrolyzed Whey may offer an advantage in digestion speed, but this does not mean that it will produce greater muscle growth than a quality Whey Isolate when total protein intake is the same.

For most people who exercise, the difference has more to do with digestion, taste, product form and price than with any dramatic difference in effectiveness.

Is the Extra Cost Worth It?

For most people, a good Whey Concentrate or Whey Isolate can fully meet their needs at a lower cost.

Hydrolyzed Whey makes more sense when someone places particular importance on digestion speed or prefers specific characteristics of this form.

In Brief

Hydrolyzed Whey = whey protein that has been partially broken down into smaller peptides.

It is a fast-digesting, high-quality form of protein, but it is not necessary for everyone and has not been shown to produce greater muscle growth on its own compared with other good forms of whey.

What Is Casein Protein?

Casein Protein, or casein, is the main protein in cow's milk and accounts for most of its total protein content. Unlike whey, casein is usually digested more slowly and releases amino acids into the bloodstream over a longer period.

For this reason, it is often used when someone wants a slower-digesting protein, for example before bed or when several hours will pass before their next meal.

Why Is Casein Digested More Slowly?

In the acidic environment of the stomach, casein can form a thicker curd. This slows the movement of protein out of the stomach and leads to more gradual digestion and absorption of amino acids.

This difference does not mean that casein is a “better” protein than whey. It simply has a different digestion rate and may therefore suit different needs.

What Is Micellar Casein?

Micellar Casein is a form of casein that largely preserves the natural micellar structure of the milk protein.

It is considered the classic slow-digesting form of casein and is often used in products intended to provide amino acids over an extended period.

What Is Calcium Caseinate?

Calcium Caseinate is a casein salt produced by treating casein with calcium.

It is widely used in various foods and protein products because of its good solubility and functional properties.

It is not exactly the same as Micellar Casein, although both are derived from milk casein.

Who Might Casein Be Suitable For?

• People who want a slower-digesting protein
• Those who prefer a thicker protein shake
• People who want protein before a longer period without food
• Those who want to supplement their total daily protein intake
• Athletes who prefer to consume protein before bed

Does Taking Casein Before Bed Make Sense?

Casein is often used before bed because it is digested slowly and provides amino acids for several hours.

Consuming enough protein before bed can support the supply of amino acids during the night, particularly in people who exercise regularly.

Nevertheless, total daily protein intake remains more important than whether someone specifically uses casein before going to sleep.

Casein or Whey?

Whey Protein is usually digested and absorbed faster, while Casein Protein is digested and absorbed more slowly.

Whey is very convenient after training or at any time during the day, while casein may make more sense when someone wants a protein that is digested over a longer period.

There is no need to choose only one. They can be used at different times during the day, depending on a person's diet and needs.

Casein and Feelings of Fullness

Because casein is digested slowly and produces a thicker texture, many people find it more filling than some thinner protein shakes.

This can be useful when following a controlled diet, but it does not mean that casein causes fat loss on its own.

Casein, Lactose and Milk Allergy

Casein is a milk protein. A casein product may contain varying amounts of lactose depending on how it is processed, but casein and lactose are different substances.

Someone with lactose intolerance may react differently depending on the product, while someone with an allergy to milk proteins should avoid products containing casein unless otherwise advised by a medical professional.

In Brief

Casein = a slower-digesting milk protein.

It provides all the essential amino acids and can be a convenient option before long periods without a meal or before bed. Micellar Casein is the most classic form, while Calcium Caseinate is a differently processed form of casein.

It is neither better nor worse than whey; it simply has different digestion characteristics and uses.

What Are Vegan / Plant Proteins?

Vegan or Plant Proteins are proteins derived from plants. They are mainly used by people following a vegan or vegetarian diet, those who avoid dairy products, or simply people who want to use more plant-based protein sources.

They can be produced from peas, rice, soya, hemp and other plant ingredients. Their quality, taste, texture and amino acid profile vary depending on the source.

Are Plant Proteins Complete?

A “complete” protein provides all the essential amino acids in adequate proportions.

Some plant proteins, such as soya, have a relatively complete essential amino acid profile. Others may contain a lower proportion of a particular essential amino acid.

For this reason, many vegan products use combinations of different plant proteins to achieve a more balanced overall amino acid profile.

Pea Protein

Pea Protein is mainly produced from yellow peas and is one of the most popular plant proteins.

It has a good essential amino acid content and is very commonly used in vegan protein powders. Its texture is usually fuller-bodied, and its taste differs from whey.

It has a relatively lower methionine content than some animal proteins, which is why it is often combined with rice protein.

Rice Protein

Rice Protein is usually produced from brown rice and is another common choice in vegan products.

It has a different amino acid profile from pea protein and is often used alongside it in blends.

The combination of Pea + Rice Protein is very common because the two sources can complement each other in terms of essential amino acids.

Soy Protein

Soy Protein is one of the most extensively studied plant proteins and provides all the essential amino acids.

It is available as Soy Protein Concentrate and Soy Protein Isolate, with Isolate usually having a higher proportion of protein.

It can be used as a regular protein source in a vegan or vegetarian diet.

Does Soya Affect Male Hormones?

Soya contains isoflavones, which are classified as phytoestrogens. This has led to several myths about a possible reduction in testosterone in men.

Normal consumption of soya or soya protein as part of a balanced diet should not be assumed to “feminise” the body or automatically reduce testosterone.

Hemp Protein

Hemp Protein comes from hemp seeds and contains protein, fibre and naturally occurring fats.

It usually has a lower protein concentration than a highly purified pea or soya isolate, but it can be used in vegan blends and products that place greater emphasis on the natural ingredient.

Other Plant Proteins

• Pumpkin Seed Protein
• Sunflower Protein
• Fava Bean Protein
• Chickpea Protein
• Oat Protein
• Potato Protein
• Almond Protein
• Mixed Plant Protein Blends

Less common plant proteins are often used in blends with other sources to improve texture, taste and the overall amino acid profile.

Vegan Protein and Leucine

Leucine is one of the key essential amino acids involved in muscle protein synthesis.

Some plant proteins contain a lower proportion of leucine per gram of protein than whey. For this reason, in some cases, a slightly larger total amount of plant protein may be needed to achieve a comparable intake of essential amino acids.

Can Vegan Protein Support Muscle Growth?

Yes. A well-planned vegan diet with sufficient total protein intake and an appropriate essential amino acid profile can support the growth and maintenance of muscle mass.

The fact that a protein comes from plants does not mean that it cannot be used effectively in a muscle-building programme.

Vegan Protein or Whey Protein?

Whey usually has a higher proportion of essential amino acids and leucine per gram and is considered a protein of very high biological value.

However, vegan protein can also meet protein needs effectively, particularly when a suitable blend is used and total daily protein intake is sufficient.

The choice therefore depends on diet, beliefs, tolerance of dairy products, taste and personal preferences.

Digestion, Taste and Texture

Plant proteins often have a different texture from whey and may be thicker or slightly “grainy”.

Their taste is also more strongly influenced by the plant ingredient. For this reason, two vegan protein powders may differ much more in taste and texture than two typical whey proteins.

Allergies and Intolerances

A plant protein may be suitable for people who avoid milk, but this does not mean that it is free from all potential allergens.

Soya, for example, is a recognised allergen. A product may also be manufactured in facilities that process milk, nuts, soya or other substances. For this reason, allergen labelling should always be checked.

In Brief

Vegan / Plant Protein = protein derived from peas, rice, soya, hemp or combinations of different plant sources.

It can be an effective protein source when total intake and the essential amino acid profile are adequate. Blends of different plant sources are often used to achieve a more balanced amino acid profile.

What Is Beef Protein?

Beef Protein is an animal-derived protein made from bovine ingredients. Contrary to what its name might suggest, it does not necessarily mean that the product is simply “powdered steak”.

Many Beef Protein products are made from hydrolysed bovine proteins or ingredients rich in collagen and other protein fractions. For this reason, their actual quality and amino acid profile can vary considerably from product to product.

How Is Beef Protein Produced?

The raw ingredient may come from various bovine tissues and then undergo processing, hydrolysis and drying to produce a protein powder.

Depending on the raw ingredient and manufacturing method, a product may have different amino acid proportions and a different collagen peptide content.

Beef Protein and Collagen

One of the main things to check is whether the Beef Protein comes mainly from muscle protein or contains a high proportion of collagen protein.

Collagen is also a protein, but it has a different amino acid profile from a typical whey protein. It is rich in amino acids such as glycine and proline, while containing lower amounts of certain essential amino acids and leucine.

For this reason, a product labelled simply “Beef Protein” should not be assessed solely by its total grams of protein. We should examine the raw ingredient and the product's full profile.

Does It Contain All the Essential Amino Acids?

This depends on the exact raw ingredient and the product's composition.

A protein based mainly on muscle tissue may have a different profile from a product based primarily on collagen peptides.

For this reason, we should not assume that all Beef Proteins have the same nutritional value or are automatically equivalent to whey.

Why Is Beef Protein Used?

• As an alternative to milk proteins
• By people who avoid whey or casein
• In lactose-free products
• In certain high-protein or paleo-style products
• By people who prefer animal protein from a non-dairy source

Is It Suitable for People with Lactose Intolerance?

Because Beef Protein does not come from milk, it usually does not naturally contain lactose.

Nevertheless, the label should always be checked for the possible presence of other dairy ingredients or cross-contamination during production.

Is It Better Than Whey Protein?

Not necessarily. Whey has a well-studied amino acid profile and a high content of essential amino acids and leucine.

Beef Protein can be a very useful alternative, but its quality depends more on its raw ingredient and composition.

If the product is largely based on collagen, it should not be considered nutritionally equivalent to whey protein simply because it lists a high total protein content.

How Do We Assess a Beef Protein Product?

• Check the exact protein source
• Check whether hydrolyzed beef protein or collagen peptides are listed
• Look at the amino acid profile, if provided
• Check the leucine and essential amino acid content
• Compare protein content per 100 g and per serving
• Check additional ingredients, carbohydrates and fats

Taste and Texture

Beef Protein has a different taste and texture from whey and often requires more flavourings or sweeteners to achieve a more pleasant finished product.

Its texture may be thicker or otherwise different depending on the degree of hydrolysis and the raw ingredient.

In Brief

Beef Protein = an animal-derived protein from cattle, but its actual composition can vary greatly from product to product.

We should not assume that every Beef Protein is “powdered meat” or automatically equivalent to whey protein. The raw ingredient, collagen proportion and amino acid profile are the main factors determining its nutritional value.

What Is Egg Protein?

Egg Protein is an animal-derived protein usually produced from egg whites. It is a complete protein, meaning that it provides all the essential amino acids the body needs to obtain through food.

It is often used as an alternative by people who do not want to or cannot use whey or casein, as it does not come from dairy products.

Egg White Protein

The most common form used in supplements is Egg White Protein, which is protein derived mainly from egg whites.

Egg whites are naturally rich in protein and very low in fat. After appropriate processing and drying, they can be turned into a protein powder used in shakes, protein blends and other high-protein products.

Whole Egg Protein

There are also products that use Whole Egg Protein or whole egg powder.

In this case, the yolk is also included, so the composition differs from pure Egg White Protein and may contain more fat and have a different overall nutritional profile.

For this reason, it is important to check whether the product contains only egg whites or whole eggs.

Amino Acid Profile

Egg protein contains all the essential amino acids and is considered a protein of high nutritional quality.

It also contains BCAAs, such as leucine, isoleucine and valine, which are involved in metabolism and muscle protein synthesis.

For this reason, it can be used as a regular protein source in a diet aimed at maintaining or building muscle mass.

How Quickly Is It Digested?

Egg Protein is generally considered a protein with a moderate digestion rate.

It is not considered as fast-digesting as whey or as slow-digesting as casein. This makes it a convenient option for use at any time during the day, depending on the overall diet.

Who Might Egg Protein Be Suitable For?

• People who want a complete animal protein without milk
• Those who avoid whey and casein
• People with lactose intolerance
• Those who want to vary their protein sources
• People who prefer protein blends containing more than one source

Egg Protein and Lactose

Egg protein does not naturally contain lactose because it does not come from milk.

For this reason, it can be an option for people with lactose intolerance.

Nevertheless, if the product is part of a blend or is manufactured in facilities that process dairy products, the label should always be checked.

Egg Allergy

Egg is a recognised allergen. People with an egg allergy should not consider Egg Protein safe simply because it is in powder form.

Processing does not mean that the proteins capable of causing an allergic reaction have disappeared. In the case of a known allergy, avoidance or guidance from an appropriate healthcare professional is needed.

Egg Protein or Whey Protein?

Both are complete animal proteins and can be used effectively to meet daily protein requirements.

Whey is usually more widely available, dissolves more easily and often has a higher leucine content for an equivalent amount of protein.

Egg Protein, on the other hand, is a useful option for those who want to avoid milk proteins.

Taste and Solubility

Egg Protein can have a different taste and texture from whey. Some products have a slightly stronger or more distinctive taste, while solubility can vary depending on processing and composition.

For this reason, it is often used in blends with other proteins to improve the overall taste and texture.

In Brief

Egg Protein = a complete animal protein usually derived from egg whites.

It provides all the essential amino acids, does not naturally contain lactose and can be a very good alternative to whey and casein. However, it is not suitable for people with an egg allergy.

What Are Protein Blends?

Protein Blends are products that combine two or more different protein sources in the same formula. Their purpose may be to combine different digestion rates, different amino acid profiles, better texture or a more comprehensive nutritional composition.

A blend may, for example, contain Whey Concentrate, Whey Isolate, Casein, Egg Protein or plant proteins in the same formula.

Why Are Different Proteins Combined?

Each protein has different characteristics. Whey is digested relatively quickly, casein more slowly, while egg protein has a different digestion rate and texture.

By combining several sources, the manufacturer can create a product with a more balanced overall profile for use throughout the day.

Whey + Casein

The combination of Whey and Casein is one of the most common in multi-protein products.

Whey provides readily available amino acids, while casein is digested more slowly. This means the product can offer a combination of more immediate and more prolonged amino acid release.

What Is Milk Protein?

Milk Protein is protein from milk that naturally includes both casein and whey.

The ratio is usually approximately 80% casein and 20% whey, similar to the natural distribution of proteins in cow's milk.

For this reason, Milk Protein products have a different digestion profile from pure whey protein.

Multi-Source Protein

A Multi-Source Protein may contain more than two protein sources.

For example:

• Whey Concentrate
• Whey Isolate
• Micellar Casein
• Egg Protein
• Milk Protein

The aim is usually to combine different properties in one product.

Vegan Protein Blends

Blends are particularly useful in vegan proteins because different plant sources can complement each other in terms of essential amino acids.

Very common combinations include:

• Pea + Rice Protein
• Pea + Hemp
• Pea + Rice + Pumpkin
• Soy + Pea
• Multi-Plant Protein Blends

Are Protein Blends Better Than a Regular Whey Protein?

Not necessarily. A blend can be useful because of its different digestion characteristics, taste or composition, but this does not automatically mean that it builds more muscle mass.

If someone already meets their total daily protein requirements with a quality whey protein, there is no requirement to switch to a blend.

What Should We Check in a Protein Blend?

• Which protein sources it contains
• Their order in the ingredients list
• How much protein it provides per serving
• Whether it contains whey, casein or egg protein
• Whether it contains plant proteins
• Whether it contains enough essential amino acids
• Whether it has added carbohydrates or fats
• Whether allergens are present
• Whether its composition suits the user's goal

Why Does the Order in the Ingredients List Matter?

Ingredients are usually listed in descending order by weight.

If a product strongly advertises the presence of Whey Isolate but it appears low down in the list, while Whey Concentrate is listed first, most of the protein probably comes from Concentrate.

For this reason, we should not judge a blend solely by the words printed in large letters on the front of the packaging.

When Can It Be a Convenient Option?

A Protein Blend can be useful:

• as a general-purpose protein during the day,
• before a longer period without a meal,
• for people who want a combination of different sources,
• in vegan products for a more complete amino acid profile,
• for people who prefer a different texture or taste from a regular whey protein.

In Brief

Protein Blend = a combination of two or more protein sources in the same product.

It can combine fast- and slower-digesting proteins or different plant sources. Whether a blend is a better choice depends on its composition and the user's needs, not simply on how many different proteins are listed on the packaging.

Whey, Isolate, Casein, Vegan, Beef or Egg – Which Protein Should I Choose?

There is no single protein that is the best choice for everyone. The right choice depends on your overall diet, your goal, your tolerance of dairy products, personal preferences, cost and how easily you can meet your daily protein needs.

For muscle growth and maintenance, getting enough quality protein each day and following an appropriate training programme matter more than whether you specifically use Concentrate, Isolate or another particular form.

For Most People Who Exercise

A quality Whey Concentrate is usually one of the most practical options. It provides complete protein, all the essential amino acids and generally offers very good value for money.

If you digest it well and do not need particularly low levels of lactose, carbohydrates or fat, there is no necessary reason to choose a more expensive form.

For Less Lactose and a Higher Protein Content

Whey Isolate is usually the most suitable option when you want a higher protein content and lower amounts of lactose, carbohydrates and fat.

It may also be better tolerated by some people with mild lactose intolerance. However, it is not a suitable solution for an allergy to milk proteins.

For Slower Digestion or Before Bed

Casein Protein, particularly Micellar Casein, is digested more slowly and can be used when you want a more prolonged supply of amino acids.

For this reason, it is often used before bed or before a longer period without a meal.

For a Vegan or Plant-Based Diet

A Vegan / Plant Protein is a suitable choice for people who do not consume animal products.

Blends of Pea + Rice Protein or other combinations of plant sources can provide a more balanced essential amino acid profile.

With sufficient overall protein intake, a plant protein can support muscle growth and recovery.

For People Who Avoid Dairy Products

In addition to plant proteins, options that are naturally free from lactose include Egg Protein and certain Beef Proteins.

With Beef Protein, however, the raw material and amino acid profile require closer attention, because some products may contain a significant amount of collagen protein.

For People Who Want Very Fast Digestion

Hydrolyzed Whey has been partially broken down into smaller peptides and can be digested very quickly.

For most people, however, this does not mean it will provide greater muscle growth than a good Whey Concentrate or Isolate. It is usually more expensive and makes more sense when digestion speed is a specific priority.

For an All-Purpose Protein Throughout the Day

A Protein Blend can be a practical choice when you want to combine more than one protein source.

For example, a Whey + Casein blend can combine faster and slower digestion, while a vegan blend can combine different plant amino acid profiles.

Quick Selection Guide

• I want a good protein for everyday use: Whey Concentrate
• I want less lactose and a higher protein content: Whey Isolate
• I want slower digestion: Micellar Casein
• I am vegan: Plant Protein Blend
• I avoid dairy products but eat eggs: Egg Protein
• I want animal protein without milk: Egg or a suitable Beef Protein
• I want whey that is digested very quickly: Hydrolyzed Whey
• I want a combination of different sources: Protein Blend

Do Not Choose Based on the Name Alone

Two products in the same category can have very different quality and composition. For this reason, we should check:

• the grams of protein per serving,
• the protein content per 100 g,
• the protein source,
• the essential amino acids,
• the carbohydrates and fat,
• the lactose content, where stated,
• the additional ingredients,
• the allergens,
• the actual serving size,
• and, of course, the price in relation to the amount of protein we are actually buying.

In Brief

There is no “best protein” for everyone.

Whey Concentrate for good value for money.
Whey Isolate when you want a higher protein content and less lactose.
Casein for slower digestion.
Vegan Protein for a plant-based diet.
Egg Protein for complete animal protein without milk.
Beef Protein as an alternative animal source, with attention to the raw material.
Protein Blends when you want a combination of different sources.

Your total daily protein intake and the quality of your overall diet remain the most important factors.

When Should I Take Protein?

When you consume protein during the day matters, but less than is often believed. For most people, the most important thing is to meet their total daily protein needs and distribute their intake fairly evenly throughout the day.

There is no single “right time” for a protein shake. The best time depends on when you eat, when you train and how much protein you consume overall.

Protein After Training

Consuming protein after training is practical and can support muscle protein synthesis, particularly when several hours have passed since your previous meal.

However, you do not necessarily need to consume it within 15 or 30 minutes of finishing exercise. Your total protein intake throughout the day and how you distribute it matter more than a very narrow “anabolic window”.

Protein Before Training

If you have eaten a meal containing enough protein 1–3 hours before exercise, you usually do not need an additional protein shake immediately beforehand.

However, if many hours have passed since your previous meal, a small amount of protein before training can be practical.

Protein in the Morning

Consuming protein at breakfast can help distribute your daily intake more evenly.

Many people consume very little protein at breakfast and much more at dinner. A more balanced distribution throughout the day can be more practical, especially for people who exercise regularly.

Protein Before Bed

Consuming protein before bed can provide amino acids during the night.

Casein is often used in this situation because it is digested more slowly, but it is not essential. Another complete protein or a regular meal containing enough protein can also meet this need.

How Often Should You Consume Protein?

For most people who exercise, it is practical to distribute their daily protein intake across several meals rather than consume almost all of it in a single meal.

There is no need to eat every 2 hours. Usually, 3–5 meals or protein servings throughout the day can be sufficient, depending on your overall schedule and goal.

How Much Protein Per Meal?

There is no absolute limit that applies to everyone. The appropriate amount depends on body weight, total daily intake and the size of the meal.

For many people who exercise, a moderate amount of high-quality protein at each main meal is a practical way to meet their needs throughout the day.

Does the Body Only “Absorb” 20–30 g of Protein at a Time?

No. The body can digest and absorb much more than 20 or 30 g of protein in a single meal.

The question is not whether the protein is absorbed, but how much of it is used at that moment for specific functions, such as muscle protein synthesis. The remaining protein is not automatically “wasted”.

Do You Need Protein on Rest Days Too?

Yes. Muscle recovery and adaptation do not stop as soon as your training session ends.

For this reason, your total protein intake should remain sufficient on rest days too, not just on training days.

Protein Shake or Regular Food?

Both can be used. A protein shake is convenient, quick and easy to portion, but it is not superior to a well-planned diet.

Foods such as eggs, yoghurt, meat, fish, cheese, pulses and soya also provide protein along with other nutrients.

A supplement makes more sense when it helps you meet your daily needs more easily.

In Brief

There is no magic time to consume protein.

What matters most is:

• meeting your total daily protein needs,
• distributing your intake fairly evenly throughout the day,
• consuming enough protein around your training session,
• and being consistent every day.

A protein shake is a tool for convenience, rather than an essential part of every exerciser’s routine.

Protein and Fat Loss – Does It Really Help?

Protein is not a “fat burner” and does not cause body fat loss on its own. Losing fat requires consuming less energy than the body uses over time.

Nevertheless, sufficient protein intake can be an important tool during a weight-loss diet, mainly because it helps preserve muscle mass, contributes to fullness and has a relatively higher thermic effect than carbohydrates and fat.

Protein and Muscle Mass Preservation

During a reduced-calorie diet, the ideal goal is not simply to reduce the number on the scales, but to lose mainly body fat while preserving as much lean tissue and muscle mass as possible.

Sufficient protein intake, particularly when combined with resistance training, helps preserve muscle mass during a calorie deficit.

Protein and Feelings of Fullness

Protein is generally one of the most filling macronutrients. A meal containing enough protein can help many people feel fuller and manage hunger more easily throughout the day.

This can make it easier to follow a calorie-controlled eating plan, although it does not mean that protein necessarily suppresses everyone's appetite in the same way.

What Is the Thermic Effect of Protein?

The body needs energy to digest, absorb and metabolise the nutrients we consume. This process is called the thermic effect of food.

Protein has a greater thermic effect than fat and generally a greater one than carbohydrates. This means that a larger proportion of its energy is used during digestion and metabolism.

This effect exists, but it is not large enough for a protein shake to act as a “fat burner”.

Whey Concentrate or Isolate During a Diet?

Both can be used during a fat-loss phase.

Whey Isolate usually provides slightly more protein and fewer carbohydrates and less fat for the same amount of product, so it may make a very strict calorie plan easier to follow.

However, the difference in calories per serving is usually relatively small. If a Whey Concentrate fits within your total daily calorie intake, there is no reason to consider it unsuitable for a fat-loss phase.

Does Protein Cause Weight Gain?

Protein contains calories, just like carbohydrates and fat. If your total daily energy intake consistently exceeds your body's needs, your body weight may increase.

Therefore, a protein shake does not inherently cause either weight gain or weight loss. Its effect depends on how it fits into your overall diet.

Can a Protein Shake Replace a Meal?

A basic protein shake mainly provides protein and is not necessarily a complete meal.

A regular meal can also provide fibre, carbohydrates, healthy fats, vitamins, minerals and a greater volume of food.

If a shake is frequently used instead of a meal, its overall nutritional composition should be considered, rather than just the grams of protein it contains.

Do You Need More Protein During a Fat-Loss Phase?

When you are in a calorie deficit and want to preserve as much muscle mass as possible, sufficient protein intake becomes more important.

The exact amount depends on body weight, body fat percentage, the size of the calorie deficit, training and the athlete's level. There is no single amount that is ideal for everyone.

Weight Loss Does Not Always Mean Fat Loss

The scales show total body weight, not just fat. Changes in water, glycogen, digestive tract contents and muscle mass can affect weight from day to day.

For this reason, the success of a fat-loss phase should not be judged solely by a single reading on the scales.

In Brief

Protein does not burn fat on its own.

However, it can help as part of a well-planned diet because it:

• supports muscle mass preservation,
• contributes to fullness,
• has a relatively high thermic effect,
• and makes it easier to meet protein needs while keeping calories under control.

Actual body fat loss still depends mainly on overall calorie balance, diet, physical activity and consistency.

Protein and Muscle Growth – What Is Really Needed?

Protein is essential for building and maintaining muscle mass, but it is not enough to “build” muscle on its own. Muscle growth requires a combination of sufficient protein, appropriate resistance training, adequate overall energy intake and proper recovery.

A protein shake is a practical way to meet your daily protein needs, not a product that causes muscle growth without training.

Training Is the Main Stimulus

Resistance training provides the main stimulus for muscular adaptation. Protein supplies the amino acids the body needs to support muscle protein synthesis.

Without appropriate training, consuming extra protein does not automatically turn into new muscle mass.

Is a Calorie Surplus Needed?

For many people who exercise, a small, controlled calorie surplus can make muscle growth easier by providing more energy for training and recovery.

This does not mean that the more calories you consume, the more muscle you will gain. A very large surplus mainly increases the likelihood of gaining body fat as well.

Does Protein Quality Matter?

Yes, but not in the sense that a particular brand or form is essential.

Complete proteins that provide all the essential amino acids are particularly useful for muscle protein synthesis. Examples include:

• Whey Protein
• Casein
• Egg Protein
• Soy Protein
• well-designed Plant Protein Blends

Why Is Leucine Mentioned So Often?

Leucine is an essential amino acid that acts as an important “signal” for activating muscle protein synthesis.

Whey is particularly rich in leucine, but this does not mean that only whey can support muscle growth. A sufficient amount of complete animal protein or a well-balanced combination of plant proteins can also meet essential amino acid needs.

Does More Protein Mean More Muscle?

No. Increasing protein intake beyond your actual needs does not lead to unlimited muscle growth.

Beyond a certain point, training quality, overall energy intake, sleep, recovery and consistency become more important.

Does a Beginner Need More Protein?

Beginners can often make significant progress in muscle growth without a very complex supplement programme, because they respond strongly to the new training stimulus.

Sufficient protein is important, but the main priorities should be correct technique, gradually increasing the training load and training consistently.

What Changes for More Advanced Exercisers?

As you become more experienced, further muscular adaptations usually become smaller and slower.

At this stage, detailed training planning, sufficient protein, appropriate energy intake and recovery become even more important.

Protein Powder or Mass Gainer for Muscle Growth?

A Protein Powder mainly provides protein.

A Mass Gainer usually provides protein together with a large amount of carbohydrates and more calories overall.

If you can easily meet your calorie needs through food but struggle to get enough protein, a protein powder may be sufficient.

If you generally struggle to consume enough calories, a mass gainer may be more practical.

Where Does Creatine Fit In?

Creatine is not protein and does not directly “build” muscle tissue in the way amino acids do.

However, it can support performance during repeated high-intensity efforts and allow many people who exercise to complete more quality training work. This can indirectly help muscle growth over time.

The Role of Sleep and Recovery

Muscle growth does not happen only in the gym. The body needs time and sufficient rest to adapt to training.

Chronic sleep deprivation, inadequate nutrition and consistently excessive training can limit progress even when protein intake is high.

In Brief

Effective muscle growth requires:

• regular resistance training,
• sufficient daily protein intake,
• adequate overall energy intake,
• progressively increasing the training load,
• proper recovery,
• sufficient sleep,
• and consistency over time.

Protein is a key part of the process, but it does not replace any of the other elements.

Protein, Kidneys, Liver & Safety – What Is Actually True?

Protein consumption, particularly the use of protein powders, has been associated with several myths about the kidneys, liver and overall health.

For a healthy adult, consuming sufficient protein as part of a balanced diet should not be confused with excessive or uncontrolled supplement use.

It is also important to distinguish guidance for healthy individuals from guidance for people with an existing kidney, liver or other medical condition.

Does Protein Harm the Kidneys?

In healthy adults without known kidney disease, available clinical studies have not shown consistent evidence that higher protein intake, at levels commonly used in sports nutrition, causes kidney damage.

Higher protein intake can temporarily increase the kidneys' glomerular filtration rate. This is a known physiological adaptation, but it should not automatically be interpreted as kidney damage.

Nevertheless, evidence on extremely high protein intakes maintained over many years is more limited. For this reason, there is no need to consume excessive protein without a specific reason.

This is more accurate than simply stating that “a lot of protein does not harm the kidneys”. A newer meta-analysis from 2026 found increased eGFR but no consistent biochemical evidence of kidney damage in adults without chronic kidney disease, while emphasising that most of the evidence is relatively short-term.

What If You Have Kidney Disease?

The situation is different when chronic kidney disease or another impairment of kidney function is already present.

In these cases, the appropriate amount of protein may need to be individualised and should not be determined using general sports nutrition guides.

People with known kidney disease, abnormal kidney function test results or related medical monitoring should consult their doctor or clinical dietitian before significantly increasing their protein intake or using supplements.

Does Protein Harm the Liver?

In healthy individuals, there is no evidence that normal protein consumption or the use of a standard protein powder causes liver damage on its own.

However, this does not mean that the same guidance applies to someone who already has liver disease or another serious medical condition.

In cases of known liver disease, the overall diet and protein intake should be individualised by the treating doctor and an appropriate nutrition professional.

Do We Need More Water When We Consume More Protein?

Protein metabolism increases the production of nitrogen-containing by-products, such as urea, which are mainly excreted through the kidneys.

This does not mean that protein automatically causes dehydration. Adequate daily fluid intake remains important, particularly for people who exercise, sweat heavily or are exposed to high temperatures.

There is no need to consume excessive amounts of water simply because you use a protein shake.

Protein and Kidney Stones

The relationship between high protein intake and kidney stones is more complex and cannot be summarised by saying that “protein causes stones”.

Overall diet, fluid intake, sodium, calcium, the type of protein, genetic predisposition and a history of kidney stones can all affect the risk.

People with a history of kidney stones need individualised dietary guidance.

Is There an Upper Limit for Protein Intake?

No single safe upper limit for protein intake has been established that applies to all healthy adults.

However, this does not mean that consuming unlimited amounts is useful or necessary.

For most people who exercise, meeting their actual needs makes more sense than continually increasing the amount without additional benefit.

EFSA also states that the available evidence is insufficient to establish a specific Tolerable Upper Intake Level for protein.

Protein Powder or Protein from Food – Is There a Difference in Safety?

Protein powder does not contain a different nutrient from the protein found in food. The body ultimately breaks both down into amino acids and peptides.

The main difference is that a protein powder is concentrated and particularly easy to consume. This makes it easier to consume a large amount compared with a regular meal.

The foundation of the diet should remain varied and include regular foods, with protein powder used as a supplement when needed.

What Should We Check When Assessing the Quality of a Protein Supplement?

• clear identification of the protein source,
• a complete nutrition label,
• the amount of protein per serving and per 100 g,
• a detailed ingredients list,
• allergens,
• the expiry date and batch number,
• a reputable manufacturer and lawful sale,
• certifications or independent testing where available,
• avoiding products with unclear composition or exaggerated therapeutic claims.

Who Needs to Take Greater Care?

Particular care is needed in cases of known kidney or liver disease, a serious metabolic condition, pregnancy or breastfeeding, the use of certain medications, or any condition involving medical dietary restrictions.

In these cases, a general article on the internet cannot replace individualised medical or dietary guidance.

In Brief

For a healthy adult, a reasonable protein intake as part of a balanced diet has not been shown to cause kidney or liver damage on its own.

However, this does not mean that “more is always better” or that the same amounts are suitable for everyone.

An adequate amount, a good-quality diet, proper hydration and adjustment to actual needs are the most sensible approach.

How Do I Read a Protein Label Correctly?

The front of a protein package is mainly promotional. It may say “Premium”, “Ultra”, “100% Whey”, “Lean”, “Isolate” or “Advanced Formula”, but these terms alone are not enough to assess the product's actual quality.

The most important information is found in the nutrition declaration, the ingredients list and the amounts per serving and per 100 g.

First, Check the Protein Content Per 100 g

The easiest initial comparison between two products is based on their protein content per 100 g.

For example:

A product containing 80 g of protein per 100 g is approximately 80% protein.

Another product containing 70 g of protein per 100 g has a lower proportion of protein, even if both provide approximately 20–25 g of protein per scoop.

Do Not Compare Products Based Only on the Scoop

Scoop size varies from product to product.

One product may provide 24 g of protein in a 30 g scoop, while another provides 24 g of protein in a 35 g scoop.

Both state 24 g of protein per serving, but the first has a higher proportion of protein in the product.

How Do I Calculate the Protein Percentage?

If the label does not state the protein content per 100 g, we can make a simple calculation.

Example:

24 g of protein in a 30 g serving

24 ÷ 30 × 100 = 80% protein

Similarly:

24 g of protein in a 35 g serving

24 ÷ 35 × 100 ≈ 68.6% protein

This makes it much easier to understand how “concentrated” the product really is.

Check the Ingredients List

The ingredients list is just as important as the nutrition information table.

Ingredients are usually listed in descending order by weight. This means that the first ingredient is present in the largest amount, the second in a smaller amount, and so on.

If a product is heavily promoted as an “Isolate Blend”, but Whey Concentrate is the first ingredient and Isolate appears much further down the list, most of the protein probably comes from Concentrate.

What Does “100% Whey” Mean?

The phrase “100% Whey” does not necessarily mean that the product is 100% protein.

It usually means that the product's protein sources come from whey.

The finished product may also contain flavourings, sweeteners, cocoa, thickeners, emulsifiers or other ingredients.

Protein, Carbohydrates and Fat

After checking the protein, we look at how much carbohydrate and fat the product contains.

It is normal for a Whey Concentrate to contain some lactose, carbohydrates and fat.

In a Whey Isolate, we generally expect lower levels of these components.

However, this does not mean that a few grams of carbohydrates or fat make a product “bad”. What matters is whether they fit your overall nutritional goal.

Sugar and Lactose

The sugars shown in a whey product's nutrition declaration may partly come from the naturally occurring lactose in milk.

For this reason, the term “sugars” does not always mean that table sugar has been added.

To determine whether added sugars are present, we should also check the ingredients list.

Amino Acid Profile – Why Is It Useful?

Some manufacturers publish the protein's complete amino acid profile.

This can help us see how much leucine, isoleucine, valine and other essential amino acids the product contains.

A clear and complete amino acid profile is particularly useful when comparing different protein sources, such as Whey, Beef or Vegan Protein.

What Is “Amino Spiking”?

The term Amino Spiking refers to practices where cheaper free amino acids or other nitrogen-containing compounds are added to a product, allowing laboratory calculations based on total nitrogen to indicate a higher apparent protein content.

This does not mean that every product containing additional amino acids is problematic. However, if a product is presented as a pure protein powder and contains large amounts of free glycine, taurine or other cheaper amino acids without a clear reason, it deserves closer attention.

How Can We Identify Possible Amino Spiking?

• Check whether free amino acids appear in the ingredients list
• Check whether a complete amino acid profile is available
• Compare leucine and EAA content with similar products
• Be cautious of products claiming an exceptionally high protein content at a very low price
• Check whether the manufacturer clearly explains the protein raw material used
• Prefer companies that provide clear information and independent testing where available

Flavour and Additional Ingredients

Flavoured proteins often contain cocoa, natural or artificial flavourings, sweeteners, lecithin, thickeners or other ingredients for flavour and solubility.

These do not automatically make the product poor quality. They simply reduce the percentage of pure protein per 100 g slightly compared with an unflavoured raw material.

How Do I Make a Meaningful Price Comparison?

Simply comparing the price of the container is not enough.

We need to see how many grams of actual protein we are buying.

Example:

A 1 kg product containing 80% protein provides approximately 800 g of actual protein.

A 1 kg product containing 65% protein provides approximately 650 g of actual protein.

If their prices are similar, the first may provide more actual protein for the same money.

Example of a Comparison Between Two Products

Product A

1 kg package
80 g of protein / 100 g
Total actual protein ≈ 800 g

Product B

1 kg package
70 g of protein / 100 g
Total actual protein ≈ 700 g

If Product A costs €40 and Product B costs €35, the price of the container alone does not tell the whole story. We also need to compare the actual amount of protein each contains.

Claims That Should Not Impress Us Too Easily

• “Ultra Premium”
• “Anabolic Protein”
• “Extreme Muscle Formula”
• “100% Pure”
• “Advanced Matrix”
• “Lean Protein”
• “Professional Formula”

The terms above may mainly be marketing names. A meaningful assessment should be based on the label, the raw material and the quantities.

Quick Checklist Before Buying

• How much protein does it contain per 100 g?
• How much protein does it contain per serving?
• How large is the scoop?
• What is the first protein source listed?
• Concentrate, Isolate, Casein or Blend?
• How much carbohydrate and fat does it contain?
• Does it contain additional amino acids?
• Is a detailed amino acid profile available?
• What are the allergens?
• How many servings does it contain?
• How much does it cost per 100 g of actual protein?
• Is the manufacturer reputable?

In Brief

A good protein is not judged by its packaging design or its biggest advertising claim.

We mainly look at:

protein percentage → protein source → ingredients list → amino acid profile → carbohydrates and fat → serving size → actual price per amount of protein.

The better we understand the label, the less we depend on marketing.

Frequently Asked Questions About Protein (FAQ)

1. How Many Protein Shakes Can I Drink Per Day?

There is no fixed number that is right for everyone. A protein shake is used to supplement your total daily protein intake. If your needs are met through food, you may not need one at all. For many people, one serving per day is enough, while others may use more depending on their diet and needs.

2. Do I Need to Drink a Protein Shake Every Day?

Not because you “must” use one daily, but because sufficient protein intake is important every day. If you get the required amount from food, there is no need to use protein powder.

3. Do I Need Protein on Days When I Do Not Exercise?

Yes, your protein needs do not disappear on rest days. Muscle recovery and adaptation continue after training. This does not mean that a shake is essential; what matters is sufficient total protein intake.

4. Protein with Water or Milk?

Both are suitable. With water, the shake usually contains fewer calories and is lighter to digest. Milk adds extra protein, carbohydrates, calories and other nutrients. The choice depends on your goal and personal preference.

5. How Much Water or Milk Should I Add?

The amount of liquid mainly affects the flavour and thickness of the shake, rather than the amount of protein in the scoop. Follow the manufacturer's recommended ratio and adjust it to suit your preferred texture.

6. Is Protein Destroyed If I Add It to Hot Food?

Heat can change the structure of proteins, a process called denaturation, but this does not mean that the protein disappears or loses its amino acids. For this reason, protein powder can be used in recipes such as pancakes, porridge or other baked foods.

7. Is Unflavoured Protein Better?

Not necessarily. Unflavoured protein may have a slightly higher protein content because it does not contain cocoa, flavourings or sweeteners. However, this does not mean that a flavoured protein is poor quality. The entire label should be assessed.

8. Does Protein Cause Bloating?

Some people may experience bloating or other digestive discomfort. Possible causes include lactose, a very large serving, certain sweeteners or individual sensitivity. If a Whey Concentrate causes discomfort, an Isolate or a different protein source may be considered.

9. Can I Take Whey If I Have Lactose Intolerance?

It depends on the degree of intolerance and the specific product. Whey Isolate usually contains much less lactose than Concentrate and may be better tolerated. In cases of severe intolerance, check whether the product is explicitly labelled as lactose-free.

10. Can I Combine Protein and Creatine in the Same Shake?

Yes. Protein and creatine have different roles and can be consumed in the same drink. There is no need to take them at different times simply because they are different supplements.

11. Do I Need BCAA If I Use Whey?

Usually not, provided your total daily protein intake is sufficient. Whey naturally contains BCAA, including leucine, along with all the other essential amino acids.

12. Can Protein Make Me Gain Weight?

Protein contains calories. If your total daily calorie intake exceeds your energy expenditure over a prolonged period, your body weight may increase. A protein shake itself does not automatically cause fat gain.

13. Can I Take Protein Without Exercising?

Yes. Protein is a nutrient, not a product exclusively for athletes. However, if your needs are already met through food, using a supplement may offer little practical value.

14. How Long Does Protein Powder Keep After Opening?

Always follow the manufacturer's expiry date and storage instructions. Keep the powder tightly sealed in a cool, dry place, away from moisture and high temperatures. Do not use a product with an altered smell, taste or appearance, or damaged packaging.

15. Which Protein Is Ultimately the Best?

There is no single best protein for everyone.

Whey Concentrate is a very good all-purpose option. Whey Isolate usually contains less lactose and a higher proportion of protein. Casein is digested more slowly. Vegan Proteins are suitable for a plant-based diet. Egg Protein is a complete animal protein without milk, while Protein Blends combine different sources.

The best choice is the one that meets your needs, is well tolerated by your digestive system, fits your diet and offers good value for money.

Conclusion

Protein is a fundamental nutrient, and protein powders provide a practical way to meet daily needs when this is difficult through food alone.

We do not need to choose protein based on marketing. We should consider the source, the actual protein content, the amino acid profile, the other ingredients, how well our body tolerates it and the product's actual price.

The best protein is not necessarily the most expensive. It is the one that suits each person's actual needs.

The information in this guide is for informational purposes and does not constitute individualised medical or dietary advice. People with health conditions, allergies, pregnancy, breastfeeding or specific medication regimens should consult an appropriate healthcare professional.