Keratin — Ingredients

Category: Ingredients

The main structural protein of the epidermis, hair, and nails that protects against external damage

What is Keratin?

The main structural protein of the epidermis, hair, and nails that protects against external damage

The primary component of the stratum corneum, protecting skin from physical and chemical irritants. Also essential for hair strength and elasticity.

Main causes & characteristics of Keratin

Keratin is known as the primary structural protein that makes up the epidermis, hair, and nails. As the main component of the stratum corneum, it plays a key barrier role in protecting the skin from physical and chemical stressors, and is also widely recognized as essential to maintaining the strength and elasticity of hair.

Managing Keratin

In skincare, hydrolyzed keratin is commonly incorporated into formulations as a moisturizing and barrier-supporting ingredient, while in hair care it is frequently used to help address and manage damaged hair. It is worth noting, however, that topically applied keratin does not directly replace the skin's own structural proteins; it is more appropriately understood as an aid for moisturization and surface coating. If scalp or skin concerns recur, consulting a dermatologist is recommended.

Related information

Mentioned alongside the stratum corneum, structural proteins, and the skin barrier. Frequently compared with other proteins such as collagen and elastin.

Everyday care tips

Excessive exfoliation may weaken the protective barrier formed by keratin, so adjusting the frequency of exfoliation to an appropriate level is generally helpful.

Manage Keratin with SKINROUTE

  • Skin100 Analysis — Skin100 precision analysis — 100+ questionnaire items analyzed by AI into 8 core skin factors
  • AI Skin Consultation — AI skin consultation chat — ask questions about your skin in your language
  • AI Challenge — AI-personalized 4–20 week skincare challenge based on your analysis results

Frequently Asked Questions (FAQ)

What is Keratin?
The main structural protein of the epidermis, hair, and nails that protects against external damage Keratin is known as the primary structural protein that makes up the epidermis, hair, and nails. As the main component of the stratum corneum, it plays a key barrier role in protecting the skin from physical and chemical stressors, and is also widely recognized as essential to maintaining the strength and elasticity of hair.
Managing Keratin
In skincare, hydrolyzed keratin is commonly incorporated into formulations as a moisturizing and barrier-supporting ingredient, while in hair care it is frequently used to help address and manage damaged hair. It is worth noting, however, that topically applied keratin does not directly replace the skin's own structural proteins; it is more appropriately understood as an aid for moisturization and surface coating. If scalp or skin concerns recur, consulting a dermatologist is recommended.

Related Entries

Explore Other Categories

Medical Disclaimer

SKINROUTE is not a medical device. All content is provided for general skincare information purposes only and does not replace medical diagnosis or treatment. If you suspect a skin disease, please consult a board-certified dermatologist.