KZL is a dandruff-clearing shampoo that uses one of the most effective anti-dandruff medications, ketoconazole, to clear your scalp of the itchy, flaky condition known as seborrheic dermatitis. KZL shampoo has also been shown to improve hair growth in patients with androgenetic alopecia (male-pattern or female-pattern baldness). For best results, shampoo daily with a rotation of a few different shampoos, using KZL about twice a week.