Keratin is a structural protein. Keratin is a structural protein that forms a key component of hair, nails and the outer layer of the skin.
For proper evaluation, we look at the form, amount per dose and actual intended use.
Keratin – What is it?
Keratin is a structural protein that forms a key component of hair, nails and the outer layer of the skin.
Where is it used?
It is found in beauty formulas, often alongside biotin, zinc or collagen.
Forms & Label
Hydrolyzed keratin and keratin-containing blends.
On the label, we examine the form, actual amount per serving and any standardization.
What do we know from the available evidence?
Taking keratin orally is not equivalent to direct incorporation into hair or nails.
The evidence is not the same for every goal, and we should not confuse a theoretical mechanism with a proven practical benefit.
Safety & Precautions
Its value depends on the overall composition and nutritional status.
Pregnancy, breastfeeding, chronic conditions or medication use are reasons to seek individualized professional advice.
Frequently Asked Questions
1. Does everyone need to take it?
No. It makes sense when it serves a specific need or goal.
2. Does a higher dose mean a better result?
Not necessarily. The form, appropriate dose and individual tolerance matter more.
3. How do I compare two products?
We compare the form, amount per serving, overall composition and number of servings.
In Brief
Keratin should be assessed according to its actual role, the evidence and the dose — not just the marketing.