Issues in food allergy and intolerance, coeliac disease, gut disorders, eczema, 'free from' and all allergies and sensitivities
If you have allergy to PPD / paraphenylenediamine or are looking to color or dye your hair without using PPD you will find that most PPD-free products fall into one of three categories. One exception is the innovative Hairprint system — but…
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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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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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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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