A study published in August 2018 by researchers at the George Mason University in the USA has demonstrated that exposure to chemicals in beauty and personal care products affect women’s reproductive hormones, and these effects may have an impact on women’s health.

What Did They Do?

In their study, researchers focused on chemicals commonly used in beauty and personal care products. These included bisphenol A (BPA), chlorophenols, benzophenones (a UV filter) and parabens (preservatives). They evaluated these chemicals in 143 women over two menstrual cycles. They also analysed the reproductive hormones oestradiol, progesterone, luteinizing hormone (LH) and follicle stimulating hormone (FSH).

The 143 women in this study were aged 18 to 44 years old, had no known chronic health conditions and did not use birth control.

Dr Anna Pollack, lead researcher, on this study noted that:

“This study is the first to examine mixtures of chemicals that are widely used in personal care products in relation to hormones in healthy, reproductive-age women, using multiple measures of exposure across the menstrual cycle, which improved upon research that relied on one or two measures of chemicals”

This is an important point to note as measuring mixtures of chemicals better reflects the real-world situation where women will be exposed to several chemicals.

What Did They Find?

The study found that exposure to these chemicals, even low-level exposure to mixtures of these chemicals affected participants’ reproductive hormones.  Specifically, they found that:

• BPA, chlorophenols, UV filters and parabens were linked with reproductive hormones
• Parabens were associated with an increase in oestradiol
• Phenol and UV filters were linked to a decrease in oestradiol, FSH and LH

What Does This Mean?

The results of this study are interesting as changes in reproductive hormones have been linked to a number of health conditions such as fibroids, breast cancer and cardiovascular disease.  Therefore, care must be taken when selecting beauty and personal care products.

Researchers noted that:

“We have early indicators that chemicals such as parabens may increase oestrogen levels. If this finding is confirmed by additional research, it could have implications for oestrogen dependent diseases such as breast cancer.” Dr Anna Pollack

Researchers therefore concluded that:

“What we should take away from this study is that we may need to be careful about the chemicals in the beauty and personal care products we use.”

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You can read the research paper describing this study here