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• Allergy symptoms

  Glyceryl mono thioglycolate has been recognized as a potential sensitizer and has been reported to cause allergic contact dermatitis in both hairdressers and clients. Hairdressers most commonly manifest their allergy as a hand dermatitis, whereas the clients most often have a dermatitis involving the scalp, face, ears, and neck. In preliminary patch testing, hair recently permanently woven with a solution containing glyceryl monothioglycolate produced positive results. These observations suggested that the permanent-waved hair may retain glyceryl monothioglycolate or a cross-reacting product. Positive reactions were seen in hair collected as long as 3 months after the permanent. This suggests that a glyceryl monothioglycolate-related allergen is retained in hair for up to 3 months after the permanent, which may explain the long-lasting dermatitis in clients sensitive to glyceryl monothioglycolate[1]. ;

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