Citrus Fruits. Citrus fruits, particularly lemons, which contain vitamins A, B and C as well as calcium, phosphorus, potassium and fiber, are blood-cleansing foods.
Another great way to reduce oil production in the scalp is by breaking up the grease before it gets into your body. To do this, every morning drink 1 pint of warm water with the juice of 1 lemon squeezed in. Add to this 1 pinch of himalayan salt, and half a teaspoon of cayenne pepper.
1 Take a capful of neem oil from the neem oil bottle. 2  Add this to a tablespoon of olive oil and mix it well. 3  Apply this to your scalp and let it sit for about 20 â 25 minutes.  Then wash your hair to prevent dandruff.