Issues in food allergy and intolerance, coeliac disease, gut disorders, eczema, 'free from' and all allergies and sensitivities
PPD, or paraphenylenediamine, is a chemical used in most permanent hair dyes, especially the darker types. When mixed with an oxidiser (typically hydrogen peroxide) and applied, it penetrates shafts of hair and transforms into an oxidised form whose molecules are…
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Following my recent article on sulfite / sulphite sensitivity, it was pointed out to me that sulfites are also used in cosmetics. Given their role in colour preservation and to prevent oxidation in foods such as dried apricots, it’s not…
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Allergy to PPD in permanent hair dye can be severe, and if you are sensitised you must avoid it. In worst cases, it causes swelling around the face and neck, and difficulty breathing. Angry red rashes around your hair line, ears…
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When a hair dye brand recently started advertising its ‘allergy gentle molecule’-containing product, I wondered whether the problem of PPD allergy had finally been solved. PPD (para-phenylenediamine) is a chemical found in a lot of permanent hair dye blends, and…
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Research was published in Contact Dermatitis looking at the instructions hair dye manufacturers give consumers about performing an allergy self-test before coloring their hair. It was a follow-on from a 2011 study, which found great variability in the instructions given, and whose…
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