Keratin is considered a protective protein and a key structural component that can be found in our hair, skin, and nails. Keratins provide both exterior protection to the hair cuticle and to the interior structure in the cortex.
 
These proteins are the building blocks that contribute to the strength, flexibility, and overall health of hair. Keratins play a key role in the cohesion and physical properties of hair and can be depleted with improper hair care regimens. Chemical treatments, use of thermal appliances, surface damage by improper grooming practices, and environmental stressors can play a significant part in destroying keratin.
 
Keratin increases the moisture content of the hair restoring luster, body and increasing manageability.