Hair straightening chemicals linked to uterine cancer risk Cancer Uterus Chemicals Hair UterineCancer JNCI_Now
By Suchandrima BhowmikOct 18 2022Reviewed by Aimee Molineux Uterine cancer is known to be one of the most common gynecologic cancers. There has been an increase in the mortality and incidence rates in the US over the past two decades resulting in more than 65,950 new cases and 12,550 deaths expected in 2022. Excess exposure to estrogen and the hormonal imbalance of progesterone and estrogen has been reported to be significant risk factors for uterine cancer.
Study: Use of Straighteners and Other Hair Products and Incident Uterine Cancer. Image Credit: Kateryna Kon / Shutterstock Information on the frequency of personal use of 7 hair products, including temporary, semi-permanent, and permanent hair dyes, highlights, bleach, relaxers, straighteners, or pressing products, as well as body waves or hair permanents, was obtained from all eligible participants. The response options were “1-2 times per year”, “every 5-8weeks”, “every 3-4months”, “did not use,” and “once per month.
“We estimated that 1.64% of women who never used hair straighteners would go on to develop uterine cancer by the age of 70; but for frequent users, that risk goes up to 4.05%,” said Alexandra White, Ph.D., head of the NIEHS Environment and Cancer Epidemiology group and lead author on the new study. “This doubling rate is concerning. However, it is important to put this information into context - uterine cancer is a relatively rare type of cancer.
Furthermore, women with low levels of physical activity were observed to be more strongly associated with using straighteners than those with high levels of physical activity. However, no association was observed between race, ethnicity, or obesity and the use of straighteners. Moreover, no effect of obesity, race, physical activity, or ethnicity was observed using hair permanents, semi-permanent dyes, or permanent dyes.
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