Question 1

What does Hydrolyzed Keratin do in a cosmetic formula?

Accepted Answer

This ingredient primarily acts as a hair and skin conditioning agent, adding light film formation, softness, and a smoother feel. In hair care, it helps improve combability and the feel of damaged fibers.

Question 2

Is Hydrolyzed Keratin clean?

Accepted Answer

This ingredient is generally viewed as acceptable in clean-beauty frameworks because it is well tolerated and not a common restricted-list material. The main caveats are animal origin, trace odor or color, and variability in processing quality.

Question 3

Is Hydrolyzed Keratin sustainable?

Accepted Answer

This material is usually made from animal-derived byproducts such as wool or feathers, so its sustainability profile depends on sourcing transparency and processing controls. It is expected to be biodegradable, but it is not vegan and is less aligned with plant-forward standards.

Question 4

Is Hydrolyzed Keratin COSMOS-approved?

Accepted Answer

This ingredient may be permitted under COSMOS-natural when the animal sourcing and hydrolysis process meet the standard’s requirements, but it is not automatically aligned for COSMOS-organic products. From a Green Chemistry view, it uses a byproduct feedstock and is biodegradable, with caveats around animal sourcing and processing aids.

Question 5

How does Hydrolyzed Keratin work chemically?

Accepted Answer

The molecule profile is a mixture of short peptides and amino acids produced by controlled hydrolysis of a fibrous animal protein, with molecular weight distribution varying by supplier. Typical use levels are about 0.1% to 5%, and it generally performs best in mildly acidic to neutral formulas where charge interactions, electrolytes, and preservation are managed.