Getting your dandruff under control is relatively simple. Use an antidandruff shampoo that contains coal tar, salicylic acid, pyrithione zinc, sulfur or selenium sulfide. Each of these ingredients has a unique way to reduce the flaking. The tar-based shampoos slow cell production, while salicylic acid-based shampoos promote the shedding of dead cells before they accumulate. Pyrithione zinc and selenium sulfide reduce cell turn over. Since one of dandruffs most persistent triggers is a fungus, a medical ingredient like pyrithione zinc can effectively kill this yeast. Clinical studies indicate that the use of a shampoo and conditioner with this medical ingredient provides an enhanced and improved antidandruff effect by doubling the dose of the active agent received by your scalp.