Bitter gourd can also treat premature graying of hair. You can apply freshly squeezed bitter gourd juice on your Grey strands. Doing this once in every ten days will reduce the Grey hair growth. Bitter gourd juice helps in reducing hair fall naturally. All you need to do is mix bitter gourd juice with a dash of sugar and use this paste on your hair to get good results. Increased intake of oily food can cause the accumulation of excess oil in your hair. If you have oily hair, you should first limit the consumption of oily food. You can apply a mixture of bitter gourd juice and apple cider vinegar to remove the excess oil from your hair.