Issues in food allergy and intolerance, coeliac disease, gut disorders, eczema, 'free from' and all allergies and sensitivities
When it comes to cosmetic or haircare products, it is the act of colouring the hair, face and body which carries the greatest risk to those with nickel allergy — be it through make-up, fake tan, or hair dye. Given…
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Allergy to paraphenylenediamine or p-phenylenediamine — better known as PPD — in permanent hair dye can be severe. In the worst cases, it causes swelling around the face and neck, with difficulty breathing. Angry red rashes around the hair line,…
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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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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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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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