Issues in food allergy and intolerance, coeliac disease, gut disorders, eczema, 'free from' and all allergies and sensitivities
Allergy to paraphenylenediamine or p-phenylenediamine — better known as PPD — in permanent hair dye can be severe. In worst cases, it causes swelling around the face and neck, with difficulty breathing. Angry red rashes around the hair line, ears…
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With the trend for beards in men showing no signs of slowing down, it’s not surprising that many guys are looking at options for dyeing them, especially if they begin to turn grey — but which are allergy safe? …
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Occasional reports have been surfacing during the Covid pandemic of an increased incidence of allergic responses to hair dye products, and the issue arose again this week, widely reported in the mainstream media, including by the BBC. I have written…
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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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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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