Hair straightening merchandise are related to the next danger of uterine most cancers
Earlier research have already linked sure hair merchandise to the next danger of hormone-sensitive cancers, together with breast and ovarian most cancers. Nevertheless, that is the primary examine to research a potential affiliation with uterine most cancers.
On this giant examine, which included sufferers of assorted ethnic backgrounds, researchers assessed associations between hair product use and incident uterine most cancers in 33,947 American girls aged 35 at 74 years previous. In questionnaires accomplished at baseline, members self-reported using hair merchandise within the earlier 12 months, together with hair dyes, hair straighteners or relaxers, and perms or curlers.
Throughout almost 11 years of follow-up, 378 instances of uterine most cancers had been recognized among the many members.
In comparison with girls who had by no means used these merchandise, those that had used smoothing merchandise within the earlier 12 months had an 80% elevated danger of uterine most cancers.
Girls who used smoothing merchandise extra often, i.e. greater than 4 instances within the earlier yr, had been greater than twice as prone to develop uterine most cancers as those that didn’t use these merchandise.
Using different hair merchandise, together with dyes, perms, or curlers, was not related to the event of incident uterine most cancers.
About 60% of ladies who stated that they had used hair straightening merchandise previously yr recognized as being of black ethnicity. Nevertheless, the examine confirmed no distinction within the affiliation between using smoothing merchandise and the incidence of uterine most cancers in keeping with ethnic origin. The authors point out that adversarial well being results could also be larger in girls of black ethnicity as a result of larger prevalence of their use.
The outcomes are just like these obtained in different research performed by the identical workforce, which demonstrated the existence of an affiliation between using hair straightening merchandise and different hormone-related cancers in girls.
Many of those merchandise comprise endocrine disruptors, together with bisphenol A, which intervene with the traditional functioning of the endocrine system. The authors of this new examine counsel that chemical publicity related to using hair merchandise, notably straightening merchandise, could also be of larger concern than publicity related to different private care merchandise because of elevated absorption on the scalp.
“We estimate that 1.64% of ladies who’ve by no means used hair straighteners can have developed uterine most cancers by age 70, however this danger may be as excessive as 4.05% amongst frequent customers. says Alexandra White, head of the Most cancers Epidemiology and Atmosphere group on the US Nationwide Institute of Environmental Well being Sciences and lead creator of the brand new examine. “This doubling of the speed is worrying. Nevertheless, it is very important put this data into perspective: uterine most cancers is a comparatively uncommon most cancers. »
“To our data, that is the primary epidemiological examine to evaluate the connection between using pores and skin smoothing merchandise and uterine most cancers,” she explains. “Additional research are wanted to verify these findings in numerous populations, to find out whether or not hair merchandise contribute to well being disparities in uterine most cancers, and to determine particular substances that will enhance most cancers danger. in girls. »
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