"As I have an inside scoop on what brands will be launching next year, I think we can expect to see a lot of serums focused on hyperpigmentation that actually deal with the problem." She told R29 that vitamins C is one of the worst ingredients to use for skin care, especially for black and brown clients. kojic acid and azelaic acid are anti- inflammatory and improve skin tone. Dr Ejikeme rates the ingredient, which controls excess pigment in the skin. Dr Ejikeme tells R29 that all of the products in the Eucerin Anti-Pigment range contain a patented ingredient that reduces the appearance of dark spots.