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.
Tea tree oil is very good for dry scalp. It moisturizes by nourishing your scalp and your hair really well. It clears all blockages in the pores. Mix it with any carrier oil like jojoba oil and massage gently onto your scalp for 10-15 minutes.