Adverse Effects of Hair Care Products on Users

The document reviewed various adverse effects associated with hair care products and treatments. Historical and modern hair dyes, including those containing paraphenylenediamine (PPD), were noted for causing allergic reactions, with alternatives suggested for sensitized individuals. Cold permanents replaced hot ones due to severe scalp irritations and burns. Hair bleaching with hydrogen peroxide and persulfates could lead to irritation and necrosis. Shampoos and conditioners evolved, with fewer adverse reactions reported. Styling products and perfumes could cause allergic contact eczema. Brazilian and Japanese hair straightening treatments gained popularity but carried risks. Minoxidil was highlighted as an effective topical treatment for androgenetic alopecia, though hair loss resumed upon cessation. The authors declared no conflicts of interest.