Keratin — Allergy Risk & Safety Profile
INCI: HYDROLYZED KERATIN
Also known as: Hydrolyzed Keratin
Key Facts
- CAS Number
- 69430-36-0
- Category
- protein
- Risk Level
- low
- Common Allergen
- No
- Found In
- hair treatment, shampoo, conditioner
Is Keratin safe in cosmetics?
Keratin is rated low risk in cosmetic products. It is not classified as a common allergen and is generally well-tolerated by most skin types. Commonly found in hair treatment, shampoo, conditioner.
What is Keratin?
Keratin is a protein commonly used in cosmetic and personal care products. It is generally considered safe for use in cosmetics at recommended concentrations.
Allergy & Safety Information
Keratin is considered safe for cosmetic use. No significant safety concerns have been identified at typical use concentrations. As with any cosmetic ingredient, discontinue use if irritation occurs.
This ingredient is considered low risk from an allergenicity perspective. Reactions are uncommon at typical cosmetic use concentrations. However, no ingredient is universally safe — if you notice redness, itching, or irritation after using a product containing this ingredient, discontinue use and monitor whether symptoms resolve.
How to Identify Keratin in Products
Cosmetic ingredients are listed by their INCI (International Nomenclature of Cosmetic Ingredients) name in descending order of concentration. To check whether a product contains Keratin, scan the ingredient list for its INCI name exactly as it appears above. Ingredients present at 1% or less may appear in any order after the 1% threshold.
Product types to prioritise checking: Hair treatment, Shampoo, Conditioner. These product categories are the most common sources of Keratin exposure based on formulation data.
Not sure if your products contain Keratin? Paste the ingredient list into the free ingredient checker to scan for Keratin and other allergens automatically.
Frequently Asked Questions
Is Keratin safe for sensitive skin?
Keratin is generally well-tolerated, even by sensitive skin types.
What products contain Keratin?
Keratin is commonly found in hair treatment, shampoo, conditioner.
What does Keratin do in cosmetics?
Keratin functions as a protein in formulations.
Related Guides
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