A Clinical Evaluation of a Permanent Hair Dye Designed to Reduce Allergic Contact Dermatitis and Hair Damage

This study evaluated an ammonia-free and PPD-free permanent hair dye in 50 ethnically diverse females aged 21–91 who were current users of permanent hair dyes. The participants underwent patch testing and two dye sessions. All participants completed the study without any cases of allergic or irritant contact dermatitis. Dermatologists observed significant improvements in hair attributes, with 87% improvement in hair shine, 90% in hair color, 88% in hair moisturization, 87% in hair porosity, and 88% in hair combability. The MEA-based ammonia-free cream hair color was deemed safe for use on diverse hair types and textures.