Keratin
A fibrous structural protein that is the key component in hair, nails, and the outer layer of skin, used in supplements and cosmetics to support these tissues
Proteins
Structural Proteins
Research: Moderate
Scientific Name
Keratin (various types)
Also Known As
Keratin Protein
Alpha-Keratin
Cytokeratin
Benefits
- Supports hair strength and resilience
- May improve nail hardness and growth
- Provides building blocks for hair and nail structure
- Helps repair damaged hair
- Supports skin barrier function
- May reduce hair breakage and brittleness
Common Forms
Capsules
Tablets
Powder
Topical treatments
Liquid
Safety Notes
Generally recognized as safe when used as directed. Derived from animal sources (typically sheep wool, feathers, or horns), so not suitable for vegans. Those with allergies to wool or feathers should use caution. Limited data on long-term supplementation. Topical products are generally well-tolerated.
Related Products
No related products
Types of Keratin
Hydrolyzed Keratin
Keratin protein that has been broken down into smaller, more bioavailable peptides through hydrolysis
Proteins
Structural proteins
Research: Moderate
Available Forms:
Intact Keratin
Unhydrolyzed, complete keratin protein structure used in certain applications
Proteins
Structural proteins
Research: Limited
Available Forms:
Keratin Derivatives
Compounds derived from or inspired by keratin structure with specialized properties
Proteins
Structural proteins
Research: Limited
Available Forms: