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The drug interferon alpha has been reported as being shown to modify hair follicles causing permanent change in a person's hair texture. [9] Chemical hair straightening uses chemical substances to break disulfide bonds, also called an S-S bond or disulfide bridge, in the hair shaft. [10] [11] There are several ways of permanently straightening ...
"There are all kinds of straighteners, but these are the more permanent straighteners," says dermatologist Dr. Fayne Frey. "Some people are doing it once, and some people are doing it many times a ...
Lawsuits alleging harm from popular hair straighteners are amplifying concerns about the products raised by scientists and the government.
A permanent wave, commonly called a perm or permanent (sometimes called a "curly perm" to distinguish it from a "straight perm"), [1] is a hairstyle consisting of waves or curls set into the hair. The curls may last a number of months, hence the name. Perms may be applied using thermal or chemical means.
A relaxer is a type of lotion or cream generally used by people with tight curls or very curly hair which makes hair easier to straighten by chemically "relaxing" the natural curls. The active agent is usually a strong alkali , although some formulations are based on ammonium thioglycolate or formaldehyde .
Researchers have produced new evidence this year linking chemical hair straighteners to those harmful effects, including Boston University’s Black Women’s Health Study, which surveyed 45,000 ...