Melanocytes become less efficient at producing that pigment, which is delivered to the hair shaft,” Dr. Heather Woolery-Lloyd, MD, FAAD, a board-certified dermatologist in Miami, tells ESSENCE.
Methods: A retrospective analysis of patch-test results since October 2006 was done and yielded 28 patients allergic to PPD who were also tested with a hair dye series. From January 2004 through ...