Study Finds Hazardous Chemicals in Hair Extensions

Silent Spring Institute analysis identifies dozens of harmful substances in products disproportionately used by Black women

Published on Feb. 11, 2026

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A new study by the Silent Spring Institute has found dozens of hazardous chemicals in hair extensions, including products made from human hair. The comprehensive analysis provides strong evidence of the potential health risks associated with this largely unregulated category of beauty products that disproportionately affect Black women.

Why it matters

More than 70% of Black women report wearing hair extensions, compared to less than 10% of women from other racial and ethnic groups. This industry has long overlooked the health of Black women, who should not have to choose between cultural expression, convenience, and their health.

The details

The study analyzed 43 popular hair extension products and found that all but two contained hazardous chemicals linked to cancer, hormone disruption, developmental problems, and effects on the immune system. These included flame retardants, phthalates, pesticides, and toxic organotins. Many of the chemicals found are listed under California's Proposition 65 for causing cancer, birth defects, or reproductive harm.

  • The study was published in the American Chemical Society journal Environment & Health on February 12, 2026.

The players

Silent Spring Institute

A non-profit research organization focused on environmental health and justice.

Dr. Elissia Franklin

The lead author of the study and a research scientist at Silent Spring Institute.

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What they’re saying

“While prior reports have found some chemicals of concern in hair extensions, there's still much we don't know about their overall chemical makeup. We wanted to get a better picture of the extent of the problem.”

— Dr. Elissia Franklin, Research Scientist, Silent Spring Institute

“This is an industry that has long overlooked the health of Black women, who should not have to choose between cultural expression, convenience, and their health.”

— Dr. Elissia Franklin, Research Scientist, Silent Spring Institute

What’s next

New York recently introduced legislation that would require manufacturers of synthetic braids and hair extensions to disclose all ingredients, and a similar bill is advancing in New Jersey. At the federal level, the Safer Beauty Bill Package includes legislation that would direct the FDA to regulate the safety of synthetic braids and hair extensions.

The takeaway

This study highlights the urgent need for stronger regulation and oversight of the hair extension industry to protect the health of Black women, who disproportionately use these products. Consumers should be aware of the potential risks and push for safer, more transparent products.