Overview
- Silent Spring Institute analyzed 43 commercially sold hair extension products and detected 169 chemicals using advanced testing.
- Nearly all items contained hazardous substances such as flame retardants, phthalates, pesticides, and organotins, with only two products testing free of these chemicals.
- Some detected substances appear on California’s Proposition 65 list of chemicals known to cause cancer or reproductive harm.
- Extensions can expose users through prolonged scalp contact and may release chemicals when heated or styled, creating additional inhalation risks.
- Researchers are urging transparency and stronger oversight as several states and the U.S. FDA consider measures to regulate safety, noting disproportionate exposure for Black women.