The brand new examine “suits in effectively” with that total physique of analysis, mentioned Alexis Temkin, a toxicologist with the nonprofit Environmental Working Group in Washington, D.C.
It hyperlinks hair product use to hormonal variations which can be according to a number of the well being results which have been tied to such merchandise, in keeping with Temkin.
The findings — printed within the journal Environmental Analysis — are primarily based on 1,070 pregnant ladies in Puerto Rico who made as much as three examine 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.
Total, ranges of estrogen, progesterone and testosterone had been decrease amongst ladies 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 is not clear, in keeping with Rivera-Nunez, whether or not ladies who use these hair merchandise could be uncovered to specific chemical compounds which can be problematic, or have a better degree of publicity to endocrine disruptors.
Past that, there are a lot of elements which may sway being pregnant hormones. The researchers factored within the variables that they might — reminiscent of ladies’s pre-pregnancy physique weight, revenue and schooling ranges, in addition to their smoking and ingesting historical past.
Nevertheless it’s not potential to account for the whole lot, Rivera-Nunez mentioned.
For now, she really useful that ladies 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 will not be essentially consumer-friendly.
“The dearth of fine labeling is an issue,” Rivera-Nunez mentioned.
Temkin suggested looking for the phrase “perfume” — a harmless-sounding time period that really features a broad vary of undisclosed chemical compounds, a few of which can be endocrine disruptors.
The Environmental Working Group has extra on private care merchandise’ substances.
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