Hair is composed primarily of proteins (88%). These proteins are of a hard fibrous type known as keratin. Keratin protein is comprised of what we call "polypeptide chains.” The word, polypeptide, comes from the Greek word "poly" meaning many and "peptos" meaning digested or broken down. In essence, if we break down protein, we have individual amino acids.
Hair normally has a moisture content of approximately 10%. If your hair’s moisture content drops below this level the key is to increase the hair’s ability of attract and retain moisture. This is accomplished by using moisturizers. Good one have "humectants" that not only replace lost moisture but actually attract moisture and retain it in the cortex of the hair. Essential fatty aids (EFA’s) are great moisturizers.
