Hydrolyzed Silk
HY-droh-lyzd SILK
What Is Hydrolyzed Silk?
Protein derived from silk fibers that has been broken down into smaller peptides for better hair penetration. It adds shine, strength, and a silky feel to hair.
Source: Silk cocoons (Bombyx mori silkworm)
Origin: Natural
Also known as: Silk Amino Acids, Silk Protein, Sericin
What Does Hydrolyzed Silk Do to Your Hair?
Penetrates the hair cortex to strengthen and add elasticity from within. Forms a protective film on the surface that provides exceptional shine and a characteristic silky feel. Improves moisture retention in damaged hair.
Best For
Damaged hair, dull hair, dry hair, fine hair, color-treated hair
Not Recommended For
Protein-sensitive hair (in excess), vegan consumers
Concentration Matters
0.5-5% in hair products
Hair Type Compatibility
Method Compatibility
Safety & Regulation
Safe for cosmetic use with a long history. Not vegan as it is derived from silkworm cocoons. Rarely causes allergic reactions. Provides real structural benefits to damaged hair.
FDA Status: Generally Recognized As Safe
FDA permits use in cosmetics without restrictions.
EWG Score: 1/10
HairAide Verdict
The go-to protein for shine and silky feel. Provides a lighter touch than keratin while delivering real strengthening benefits. Not vegan, so plant-based protein fans should look to rice or oat alternatives.
Products That Contain Hydrolyzed Silk
Conditioners, hair masks, shine treatments, protein treatments, leave-in products
Alternatives to Hydrolyzed Silk
If you want to avoid Hydrolyzed Silk, look for products with these ingredients instead:
Hydrolyzed Keratin, Hydrolyzed Rice Protein, Hydrolyzed Wheat Protein
Frequently Asked Questions
Yes, Hydrolyzed Silk has a safety rating of 8/10 and is generally considered safe for use in hair products. Safe for cosmetic use with a long history. Not vegan as it is derived from silkworm cocoons. Rarely causes allergic reactions. Provides real structural benefits to damaged hair.
Hydrolyzed Silk is not CG-method approved. Curly hair types may want to avoid this ingredient or use products containing it sparingly.
No, Hydrolyzed Silk is not approved for the Curly Girl method.
Some alternatives to Hydrolyzed Silk include: Hydrolyzed Keratin, Hydrolyzed Rice Protein, Hydrolyzed Wheat Protein
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