What is a Keratin Hair Treatment?
Keratin is a protein that strengthens hair. Found naturally in about 88 percent of hair, the protein helps treat and cure damaged hair cuticles. Keratin hair treatments are used to straighten, smooth out, strengthen, add shine to and tame frizziness of curly hair. Treatments cost between $250 and $600, and last about three to four months. Keratin in the treatment rearranges hair protein to produce a sleeker and softer look. While the treatment lasts, women with naturally curly hair can continue getting a straight and smooth hair style at home after leaving the salon.Photo: Getty Images