The chief goal of people who opt for keratin hair straightening: smoother, straighter hair. The treatment works by fusing keratin, a protein naturally found in hair, into the hair with heat and usually some formaldehyde, which helps the keratin molecules bind with each other. The keratin protein in the hair treatment fills in any gaps, weak spots and breakage in the hair and smooths individual strands of hair.
The procedure is fairly simple. The keratin solution is first applied to clean, washed hair. The hair is then blowdried and flatironed. After treatment, clients must allow time for the keratin solution to sink in. This means waiting one to four days before washing their hair, putting it in a ponytail, or otherwise bending it. Even tucking a stray strand behind the ear is verboten, lest the newly straightened hair develop a kink.
There are numerous variations on the keratin straightening treatment. As concern over the health drawbacks of formaldehyde grows, keratin treatments without formaldehyde are appearing on the market. These products are made with aldehyde, a close relative of formaldehyde.
Who's Done It?
Nicole Richie is a huge fan of the keratin straightening treatment. Ashley Tisdale, Halle Berry and Lindsay Lohan have also had keratin straightening.