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Title: Allergic contact dermatitis to substitute hair dyes in a patient allergic to para-phenylenediamine: Pure henna, black tea and indigo powder. Author: Swan BC, Tam MM, Higgins CL, Nixon RL. Journal: Australas J Dermatol; 2016 Aug; 57(3):219-21. PubMed ID: 26916211. Abstract: We report a case of a 50-year-old lady with allergic contact dermatitis to para-phenylenediamine, who in her quest to find a substitute hair dye, subsequently reacted to a number of plant-based hair dyes, including pure henna, black tea and indigo powder respectively. While these substances all contain tannins, testing to possible constituents tannic acid and gallic acid was negative.[Abstract] [Full Text] [Related] [New Search]