percent of hair that is protein
Guest Blogger Hair Science Hair Tips protein. Labels: Guest Blogger | Hair Science | Hair Tips | protein. via JustCurlz. Naturally curly hair relies on a balance of proteins, nutrients, and oils to support healthy roots. Your hair is approximately 91 percent protein, and is made up of long chains of amino acids. Harsh chemical treatments, exposure to sun, pollution and lack of proper care can lead to the breaking up of these chains resulting in brittle and dull hair.