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…
Read more
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…
Read more
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…
Read more
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…
Read more
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…
Read more
By continuing to use the site, you agree to the use of cookies. Please read our Privacy Policy and our Affiliates Disclosure in 'About' more information
The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.