How we scored it
Keratin hydrolysate of amino acids and peptides; hydrolysis reagents leave no mass: 1.00.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.
Where it comes from
Hair or wool keratin from animal by-products is hydrolysed with acid, alkali or enzymes, sometimes after reducing its disulfide bonds, then filtered. No significant synthetic route exists.
In plain English
Keratin protein from hair or wool that has been broken into small peptides and amino acids with acid, alkali or enzymes. It coats hair and skin to smooth them and help hold moisture. It comes from animal hair, usually a by-product of other industries.
CosIng definition: Keratins, hydrolyzates. A biological material consisting predominantly of partially hydrolyzed keratin
References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2HYDROLYZED HAIR KERATIN. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3HYDROLYZED HAIR KERATIN. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=HYDROLYZED%20HAIR%20KERATIN