How often should I shampoo my hair if I have dandruff?

Ion Anti Dandruff Shampoo can be used every day for all hair types because it has a conditioning formula. Stronger treatments, such as Medi Dan Extra Dandruff Treatment Shampoo, can be used occasionally on all hair types, but may be too drying for daily use on hair that is dry, damaged or brittle. This shampoo is best for dandruff combined with oiliness and flaking.