A Clinical Evaluation of a Permanent Hair Dye Designed to Reduce Allergic Contact Dermatitis and Hair Damage
July 2022
in “
Journal of Cosmetic Dermatology
”
Studysummary In this study, an ammonia-free and PPD-free permanent hair dye was tested on 50 ethnically diverse females, showing no cases of contact dermatitis and significant improvements in hair shine, color, moisturization, porosity, and combability after two dyeing sessions.
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