1. If you have dandruff, which is the result or skin cells turning over too quickly--not dry skin, or a flaky, itchy scalp, use a dandruff shampoo containing pyrithionze zinc.
2. Eat healthy and consume foods with vitamins, such as carrots or sweet potatoes, and healthy fats, such sardines or avocado.
3. If you can eat foods containing certain nutrients--great. If not, take a multi-vitamin or specific supplements to promote a healthy scalp. Here are some of the vitamins and their benefits: Vitamin A (produces healthy scalp sebum), Vitamin C (keeps skin and hair healthy), Vitamin B3/Niacin and Vitamin E (promotes scalp circulation), Vitamin B5/Pantothenic Acid, Vitamin B6, Vitamin B12 and Biotin (prevents hair loss).