Marcia Teixeira Brazilian Keratin is a revolutionary treatment for all kinds of hair. This is an intense treatment that leaves hair soft, shiny and frizz free. These hair products do not use strong chemicals to open and close the hair cuticle in an effort to straighten it, "breaking the bones" of the hair shaft. Keratin is a natural substance which comprises approximately 88% of the hair. Marcia Teixeira Brazilian Keratin penetrates the hair repairing internal damage and coats the hair preventing further damage. The results are soft, shiny, straight hair.