Keratin: Essential Protein for Skin, Hair, Nails, and Organ Protection

Keratin is a fibrous protein in the epidermis, hair, nails, and other tissues. Its functions:

1. Skin Protection: Barrier against UV, pollutants, microbes; prevents water loss.
2. Hair Structure: Primary component giving strength, flexibility, texture; determines curl pattern.
3. Insulation: Protects organs from temperature extremes; retains body heat.
4. Cell Function: Regulates cell growth, differentiation, communication; maintains structural integrity.
5. Nail Composition: Provides hardness, protects nail bed and fingertips.
6. Shock Absorption: Cushions against physical trauma.

Healthy keratin levels depend on diet, sun protection, proper care; aging and medical conditions can reduce production, causing dryness, wrinkles, hair damage.