Recent research by Zoe Diana Draelos, M.D., published in the Journal of Cosmetic Dermatology, sought to improve the most common "anti-aging" method used by both men and women: permanent hair dye.
Related: Research Identifies Citrate Synthase/Citric Acid Axis as Hair Growth Target
Permanent hair dye is known to cause irritant contact dermatitis due to ammonia, and allergic contact dermatitis due to paraphylenediamine (PPD), the article reports. The work therefore examined the effects of an MEA-based ammonia-free and PPD-free permanent hair dye in 50 diverse females from ages 21–91 who were active users of permanent hair dyes.
Subjects were patch tested prior to dyeing and subjected to two dyeing sessions, one at the beginning of the test, and another 2-6 weeks afterward, depending on the habits of the individual. The study found that all 50 of the subjects showed no incidences of allergic or irritant contact dermatitis. In addition, dermatologists found improvements in hair shine, color, moisturization, porosity and combability.
The study concluded that the MEA-based ammonia-free cream hair color without PPD or resorcinol would be safe on the hair and scalp of females with various hair types and textures.
The full open access article is available to read for free.