Hair straightening chemical substances are linked to a better danger of uterine most cancers

Hair straightening chemical substances are linked to a better danger of uterine most cancers

Information launch

Monday, October 17, 2022

NIH research suggests black ladies could undergo extra on account of larger use.

>Girls who used chemical hair straighteners had been at better danger of uterine most cancers in comparison with ladies who didn’t report utilizing the merchandise, in keeping with a brand new Nationwide Institutes of Well being research. The researchers discovered no affiliation with uterine most cancers for different hair merchandise the ladies reported utilizing, together with hair dyes, bleaches, highlights, or perms.

Knowledge from the research included 33,497 American ladies aged 35-74 collaborating in A sister’s research, a research led by the Nationwide Institute of Environmental Well being Sciences (NIEHS), a part of the NIH, that seeks to determine danger elements for breast most cancers and different illnesses. The ladies had been adopted for nearly 11 years, throughout which era 378 instances of uterine most cancers had been detected.

Researchers discovered that ladies who reported frequent use of hair straightening merchandise greater than 4 instances within the earlier 12 months had been greater than twice as prone to develop uterine most cancers in comparison with those that didn’t use the merchandise.

“We estimate that 1.64% of ladies who’ve by no means used hair straighteners will develop uterine most cancers by the age of 70; however for frequent customers, that danger will increase to 4.05%,” stated Alexandra White, Ph.D., head of the NIEHS Environmental and Most cancers Epidemiology Group and lead writer of the brand new research. “This doubling of the speed is worrying. Nevertheless, you will need to put this info into context – uterine most cancers is a comparatively uncommon kind of most cancers.”

Uterine most cancers accounts for about 3% of all new cancers, however is the most typical most cancers of the feminine reproductive system, with 65,950 new instances in 2022. Analysis reveals that illness indicators Uterine most cancers is on the rise in america, particularly amongst black ladies.

Based on a research printed within the Journal of the Nationwide Most cancers Institute, roughly 60% of members who used straighteners prior to now 12 months recognized themselves as black ladies. Though the research didn’t present that the connection between straightener use and the incidence of uterine most cancers differed by race, the unfavorable well being results could also be stronger for black ladies due to the upper prevalence of use.

“As a result of black ladies are extra seemingly to make use of hair straighteners or relaxers and have a tendency to start out utilizing them at an earlier age than ladies of different races and ethnicities, these findings could also be much more related to them,” Chae-Jung stated. Chang, Ph.D., is an writer on the brand new research and a analysis fellow within the NIEHS Division of Epidemiology.

The findings are in line with earlier analysis displaying that straightening merchandise could enhance the danger of hormone-related cancers in ladies.

The researchers didn’t gather info on the manufacturers or substances of the hair merchandise the ladies used. Nevertheless, they word within the article that some chemical substances which were present in straighteners (similar to parabens, bisphenol A, metals and formaldehyde) could contribute to an elevated danger of uterine most cancers. Chemical publicity to hair merchandise, particularly straighteners, could be extra of a priority than different private care merchandise on account of elevated scalp absorption, which could be exacerbated by burns and injury attributable to straighteners.

“To our data, that is the primary epidemiological research to look at the affiliation between straightener use and uterine most cancers,” White stated. “Extra analysis is required to substantiate these findings in several populations, to find out whether or not hair merchandise contribute to well being disparities in uterine most cancers, and to determine particular chemical substances that will enhance most cancers danger in ladies.”

This staff earlier than discovered that everlasting hair dye and straighteners could enhance the danger of breast and ovarian most cancers.

Grant numbers: Z01-ES044005, Z1AES103332-01

In regards to the Nationwide Institute of Environmental Well being (NIEHS): NIEHS helps analysis to grasp the consequences of the surroundings on human well being and is a part of the Nationwide Institutes of Well being. For extra info on NIEHS or environmental well being matters, go to or subscribe to a information listing.

In regards to the Nationwide Institutes of Well being (NIH):NIH, the nationwide company for medical analysis, contains 27 institutes and facilities and is a element of the US Division of Well being and Human Companies. NIH is the lead federal company that conducts and helps fundamental, scientific, and translational medical analysis, and investigates the causes, therapies, and cures for each frequent and uncommon illnesses. For extra details about NIH and its packages, go to

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Che-Jung Chang, Kathy M. O’Brien, Alexander P. Keil, Simiel A. Gaston, Chandra L. Jackson, Dale P. Sandler, Alexandra J. White. Use of hair straighteners and different hair merchandise and uterine most cancers. Journal of the Nationwide Most cancers Institute DOI: (2022).


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