Contact Allergens in "PPD-Free" Hair Dyes.

ABSTRACT: Background: Hair dyes are a commonly used cosmetic product and an important cause of allergic contact dermatitis (ACD). Primary hair dye agents, paraphenylenediamine (PPD) and other aromatic amines, are potent contact sensitizers. Despite some hair dyes being advertised as all natural or allergen-free, patients still present with hair dye contact allergy following the use of these products. We hypothesized that these products may contain cross-reactive ingredients not tested on standard series or undisclosed ingredients such as trace amounts of the allergens. Objective: We aimed to test hair dyes marketed and sold in the United States as "PPD-free" for the presence and quantity of common hair dye allergens and ingredients, including

SUBMITTER: Needle CD 

PROVIDER: S-EPMC12746475 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature