Best Non Toxic Hair Care Products
Product curator: Camille May
Medical reviewer: Olushola Awoyemi, PHD
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TLDR, only what you "need to know":
- Research suggests that certain ingredients found in some hair care propducts may lead to negative health effects like skin sensitization, carcinogenicity, liver and kidney toxicity, and endocrine disruption.
- We rank hair care products using the Welpr Rating, a score that reflects a products safety, consumer satisfaction, and eco-ethical standing. To reduce human bias in the Welpr Rating, we calculate it using a mathematical formula.
- The ancient Romans concocted black hair dye by fermenting leeches in vinegar.