That familiar curry-leaf hair-oil recipe may have more to it than just an old beauty ritual. The leaves are traditionally infused into oils to create a nourishing scalp and hair treatment, but the oil you choose can change the experience. Some oils are better suited to dry, fragile strands, while others create a richer treatment for the scalp and hair lengths. From classic coconut oil to heavier castor oil, these five combinations can add variety to your routine. Just remember: healthier-looking hair and actual new growth are not always the same thing.