Used primarily in anti-dandruff shampoos to treat scalp conditions such as dandruff and seborrheic dermatitis. It works by reducing the growth of fungi and yeast on the scalp that contribute to flaking and irritation. Also effective in treating tinea versicolor, a fungal skin infection causing discolored patches. Applied topically, it helps normalize skin cell shedding and reduces scaling. Commonly found in medicated shampoos and lotions, it is used periodically until symptoms improve.