Collagen
 

Experts believe that collagen has beneficial effects on hair health and growth, and they are as follows: Keratin Production, one of the answers to what does collagen do for your hair lies in the connection between the amino acids found in collagen, and another protein that ... Healthy scalp is a another reason that collagen plays a significant part in your hair's health is that your hair follicles are housed in the dermis layer of the skin. ... Healthy Gut