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Keratin
Keratin
Low concern
Keratin is a natural protein. Hydrolyzed keratin used in cosmetics has a long history of safe use.
Found in
8 products
What it is
Fibrous structural protein extracted from animal sources (wool, feathers, horn, hair).
Not typical in food; rare as a hydrolyzed protein supplement. Primary use is in cosmetics for hair conditioning.
Why it's flagged
- allergen potential in sensitized individuals
- not a regulated food additive
What regulators actually say
"The Cosmetic Ingredient Review Expert Panel concluded that hydrolyzed keratin is safe as used in cosmetic formulations."
Regulatory status
United States — FDA
Not a listed direct food additive; some hydrolyzed protein forms self-affirmed GRAS.
European Union — EFSA
Not assigned an E-number.
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