Note: Dr. Loretta Pratt, a board-certified dermatologist at Advanced Dermatology PC, says Malassezia yeast thrives on sebum, which builds up on the scalp when you don't shampoo often enough.

zinc pyrithione Cheung recommends CLn’s shampoo because it has salicylic acid, a common hair and skin care ingredient that helps to unclogs hair follicles and remove excess sebum. Though this ...