In a National Institutes of Health (NIH)-funded study of over 33,000 women, researchers found that women who used chemical hair straightening products were at higher risk for uterine cancer than women who did not use these products. The participants were between the ages of 35-74 and were followed for almost 11 years; during that time, 378 uterine cancer cases were diagnosed. Those who used hair straightening products more than four times in a year were more than twice as likely to go on to develop uterine cancer compared to those who did not use the products. 1.64% of women who never used hair straighteners would go on to develop uterine cancer by the age of 70; but that risk goes up to 4.05% for frequent users.
Uterine cancer accounts for about 3% of all new cancer cases but is the most common cancer of the female reproductive system, with 65,950...
