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.
Massage the oil deeply into your hair for a few minutes. You can also massage it on to your scalp if you have dry scalp. For the most effective conditioning, wrap your hair in a shower cap and let the oil soak in for 15 minutes or more.