Synthetic fabrics can impact your hormone levels. Here's how

Synthetic fabrics can impact your hormone levels. Here's how

Endocrine-disrupting chemicals (EDCs) in clothing and in rugs can disrupt your hormone levels. Here's what you can do about it

Photo credit: Getty


The body relies on a delicate balance of hormones to regulate everything from growth and metabolism to mood and reproduction. But this balance can be disrupted by harmful substances known as endocrine-disrupting chemicals (EDCs).

These mimic or interfere with natural hormones and are linked to cancer, infertility, developmental problems in children, thyroid dysfunction and metabolic issues.

Worryingly, EDCs are found in unexpected places, which means we may be exposing ourselves without realising.

Take workout clothes, for example.

Many are made from synthetic fabrics like spandex, nylon, or polyester, which are treated with chemicals such as phthalates, bisphenols, and brominated flame retardants to improve stretch and moisture resistance.

These chemicals, however, are known EDCs.

A recent study by the University of Birmingham found that the oily components of sweat may increase the release and absorption of these toxic chemicals through the skin during exercise, potentially allowing them to enter the body and disrupt hormone function.

Carpets and rugs are another common source of EDCs, especially those made from synthetic fibres and treated with EDCs like DEHP, a harmful phthalate banned in the EU, and PFAS, a toxic ‘forever chemical’ that builds up in the body over time.

A woman wearing a purple workout outfit stands with her back to the camera and arms behind her back.
Many workout clothes are made from synthetic fabrics like spandex, nylon or polyester - Photo credit: Getty

These substances can leach into household dust, which is easily inhaled or ingested, particularly by little ones playing on the floor.

If you’re concerned about your exposure to EDCs, choose clothing and home products labelled PFAS-free, phthalate-free or certified with the EU Ecolabel.

Opt for natural fibres like organic cotton or wool, and avoid materials with unnecessary waterproofing or stain-proofing treatments.


This article is an answer to the question (asked by Viv Horner, Lincoln) 'Can chemicals in clothing mess with my hormones?'

To submit your questions, email us at questions@sciencefocus.com, or message our Facebook, X, or Instagram pages (don't forget to include your name and location).

Check out our ultimate fun facts page for more mind-blowing science


Read more:

This website is owned and published by Our Media Ltd. www.ourmedia.co.uk
© Our Media 2025