Take a bowl and add 2 tablespoons of castor oil, one tablespoon of olive oil, and one tablespoon of mustard oil. The mixture is supposed to be very healthy for your hair because of the nourishing benefits of mustard oil and strengthening qualities of olive oil. Apply the mixture to your scalp and the entire length of your hair. Then cover it with a shower cap and leave it for an hour. Wash it with lukewarm water afterwards.