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 few drops of tea tree oil and add this to few drops of eucalyptus oil. 2  Warm the oil and apply this to your scalp by massaging it all over the scalp. 3  Or you can use this as a rinse by combining both of these oils in water.  Or you can add few drops to your regularly used shampoo and shampoo your hair with this.