Hair is primarily composed of a protein called keratin. Keratin is a fibrous protein that is also found in skin and nails. It is made up of amino acids and forms strong, flexible fibers that give hair its strength and structure. There are different types of keratin, and the type found in hair is called alpha-keratin. This specific type of keratin is responsible for the unique properties of human hair, such as its flexibility, elasticity, and ability to retain moisture.
Key characteristics of keratin in hair:
- Strength and Structure: Keratin forms strong fibers that provide hair with its structural integrity, making it resistant to breakage and damage.
- Flexibility and Elasticity: Keratin's unique structure allows hair to bend and stretch without breaking, giving it its flexibility and elasticity.
- Moisture Retention: Keratin molecules contain amino acids that attract and hold water, helping to keep hair hydrated and prevent dryness.
Types of keratin found in hair:
- Type I: This type is softer and more flexible, found in the outer layer of hair.
- Type II: This type is harder and more rigid, found in the inner layer of hair.
Keratin and hair health:
- Keratin is essential for healthy hair growth and maintenance.
- Damage to the keratin structure can result in brittle hair, split ends, and breakage.
- Protein treatments, which often contain keratin, can help to strengthen and repair damaged hair.
