The brand new research “matches in properly” with that total physique of analysis, stated Alexis Temkin, a toxicologist with the nonprofit Environmental Working Group in Washington, D.C.

It hyperlinks hair product use to hormonal variations which are in line with a few of the well being results which have been tied to such merchandise, based on Temkin.

The findings — printed within the journal Environmental Analysis — are based mostly on 1,070 pregnant girls in Puerto Rico who made as much as three research visits over the course of their being pregnant. They accomplished questionnaires on private product use and gave blood samples to have their hormone ranges measured.

General, ranges of estrogen, progesterone and testosterone have been decrease amongst girls who reported utilizing “different” hair merchandise, versus nonusers. That class included dyes, straighteners, bleaches and mousse, however not shampoo, conditioner, hair spray or hair gel.

It isn’t clear, based on Rivera-Nunez, whether or not girls who use these hair merchandise may be uncovered to specific chemical compounds which are problematic, or have the next stage of publicity to endocrine disruptors.

Past that, there are a lot of elements that may sway being pregnant hormones. The researchers factored within the variables that they might — comparable to girls’s pre-pregnancy physique weight, revenue and training ranges, in addition to their smoking and consuming historical past.

Nevertheless it’s not doable to account for all the things, Rivera-Nunez stated.

For now, she really useful that girls who’re pregnant or planning a being pregnant learn labels and concentrate on what they’re placing on their our bodies. On the similar, she acknowledged that these labels should not essentially consumer-friendly.

“The dearth of fine labeling is an issue,” Rivera-Nunez stated.

Temkin suggested searching for the phrase “perfume” — a harmless-sounding time period that truly features a broad vary of undisclosed chemical compounds, a few of which can be endocrine disruptors.

Extra info

The Environmental Working Group has extra on private care merchandise’ components.

SOURCES: Zorimar Rivera-Nunez, PhD, MS, assistant professor, biostatistics and epidemiology, Rutgers Faculty of Public Well being, Piscataway, N.J.; Alexis Temkin, PhD, toxicologist, Environmental Working Group, Washington, D.C.; Environmental Analysis, Nov. 17, 2021, on-line

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