Keratin: What Is It? Hair is composed almost entirely of Keratin: a hard, fibrous protein that also composes the nails and the upper layer of the skin.
What Causes Keratin Loss? Unfortunately, the structure of the hair protein can be damaged by chemical procedures, such as permanent and dye. Environmental factors such as sun, wind and chlorinated water can also weaken and damage the structure of the hair protein called keratin.
Keratin Treatment At Home: Homemade keratin for hair treatment (DIY) is the best way to obtain good smoothing, straightening, Brazilian blowout your hair needs.