KERATIN AMINO ACIDS

About KERATIN AMINO ACIDS

Amino acids from hydrolyzed keratin protein — penetrate hair and skin to strengthen, repair, and moisturize. Great for damaged hair and dry skin. CIR-reviewed and safe.

Detailed Analysis

Keratin Amino Acids is the mixture of amino acids resulting from complete hydrolysis of keratin protein. Functions as a hair and skin conditioning agent. The CIR Expert Panel concluded keratin-derived ingredients are safe as used in cosmetics. The small molecular size allows penetration into hair cortex and stratum corneum for effective repair. Typically used at 0.5-2% in formulations. Non-carcinogenic, non-sensitizing, and non-comedogenic per CIR review. One isolated case of allergic reaction to hydrolyzed keratin was reported, but broader patch testing showed negative sensitization results.

What It Does

Skin Benefits

• ✓ Strengthens and repairs damaged hair
• ✓ Humectant properties — helps retain moisture in skin
• ✓ Improves hair elasticity and reduces breakage
• ✓ Skin conditioning and smoothing effects

Known Concerns

• ⚠ Very rare allergic reactions possible (one case report in literature)
• ⚠ Animal-derived sources may contain impurities if not properly refined
• ⚠ Should be manufactured to limit heavy metals and pesticide residues

References