Overview
- Consumer Reports’ expanded analysis of 30 products found volatile organic compounds in all samples and lead in 29, with human hair showing the highest contamination.
- A 2026 follow-up of 10 popular synthetic products detected lead in nine of them and carcinogenic VOCs in every sample.
- Some items registered undetectable heavy metals, including Dosso Beauty Hypoallergenic Kanekalon Fiber, indicating cleaner production is achievable.
- Brands cited third-party testing and transparency, with some noting trace detections and offering explanations such as vinegar pre-washes contributing to acetone levels.
- Consumers have reported itching, rashes and burning, and experts advise limiting wear time, avoiding heat-sealing, using gloves while braiding and keeping extension hair out of the mouth and away from children; adverse reactions can be reported to FDA MedWatch and the CPSC.