A major new scientific study has found that hair extensions worn by millions of women worldwide may contain dozens of hazardous chemicals linked to breast cancer, hormone disruption, reproductive harm, and other health risks.
Researchers at the US-based Silent Spring Institute identified 48 hazardous chemicals in 43 tested samples of synthetic and human hair products, including wigs, braiding hair, weaves, clip-ins, and other extensions.
According to the study, all but two samples contained at least one harmful substance, making it the most comprehensive investigation yet into chemical exposure from hair extension products.
Among the substances detected were flame retardants, phthalates, pesticides, styrene, and organotin chemicals associated with cancer, endocrine disruption, infertility, and birth defects.
Scientists said 17 of the detected compounds have been linked specifically to breast cancer, while nearly 10 percent of products contained organotins at concentrations exceeding European Union safety thresholds.
Lead author Dr. Elissia Franklin of Silent Spring Institute said the findings reveal serious gaps in consumer protection, noting that many manufacturers do not disclose the chemical composition of hair extensions. Products lacking fiber disclosure were found to contain some of the highest levels of hazardous substances.
The study also highlights concerns for Black women, who are among the largest users of hair extensions globally. Previous exposure studies have shown that Black women disproportionately use such products and may face greater cumulative health risks from prolonged wear and repeated exposure.
Health experts say the lack of regulation in the hair extension industry leaves consumers largely responsible for assessing product safety themselves. Unlike cosmetics and pharmaceuticals, hair extensions are subject to limited ingredient transparency requirements in many countries.
Consumer advocates and environmental groups are now calling for stricter oversight, mandatory labeling of chemical ingredients, and stronger safety standards to protect users from long-term exposure risks.
- ScienceDaily /BBC
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