Hello,
Dandruff is associated with a tiny
fungus called Pityrosporum ovale, or P. ovale for short. This
fungus lives on our bodies and scalp all the time, usually without causing a problem. Unfortunately, for some people, it can get out of control -- leading to dandruff.
Eat a healthy diet. You can also take vit B6 and vit A and E which are good for hair and skin. Try medicated shampoos for dandruff. There are a number of over-the-counter shampoos available that can help.