Hair Straightening Chemicals and Cancer | Uterine, Endometrial & Ovarian Cancer
There is a growing number of lawsuits which claim that hair relaxers contain toxic chemicals. These chemicals can cause cancer and disrupt hormones according to a recent study released by the National Institute of Environmental Health Sciences (NIEHS), which is part of the National Institute of Health (NIH).
The Sister Study, a study led by NIEHS, included 33,497 U.S. women ages 35-74 and sought to identify risk factors for breast cancer and other health conditions. The women were followed for almost 11 years and during that time 378 uterine cancer cases were diagnosed. The researchers found that women who reported frequent use, defined as more than four times in the previous year, of hair straightening products were more than twice as likely to develop uterine cancer compared to those who did not use the products.