Regulatory News Related to Cosmetic Products

March 2007 in “ Annales de Dermatologie et de Vénéréologie ”

A. Pochet

paraphenylenediamine glycerol monothioglycolate ammonium persulphate cocamidopropyl betaine minoxidil irritation dermatitis allergic contact eczema contact urticaria PPD GMTG Rogaine

From the encyclopedia

cocamidopropyl betaine →

Minoxidil →

An essential vasodilator with some anti-androgenic effects

Studysummary This review discusses the adverse effects of hair care products, highlighting irritation dermatitis and allergic contact eczema due to common allergens like paraphenylenediamine and glycerol monothioglycolate, but reports no clinical results. Our plain-language summary of this paper — not a Tressless recommendation.

The document discussed the adverse effects associated with hair care products used by professionals, which included irritation dermatitis and allergic contact eczema affecting various areas such as the scalp and face. Key allergens identified were paraphenylenediamine (PPD) in hair dyes, glycerol monothioglycolate (GMTG) in acid perm lotions, and ammonium persulphate in hair lighteners, with the latter causing contact urticaria. Other allergens mentioned included cocamidopropyl betaine in surfactants, preservatives, fragrances, and minoxidil, which was frequently used by patients.

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Research cited in this study

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research Permanent Hair Dyes and Bladder Cancer Risk

24 citations , January 2001 in “International Journal of Cancer”

This study from Los Angeles supports the idea that using permanent hair dye may increase bladder cancer risk in US women, especially those with a slow NAT2 acetylation phenotype.