4. Neem oil
A vegetable-based oil, neem oil comes from the neem tree, which is an evergreen tree that is indigenous to India. The reason neem oil is an effective remedy for dandruff is that it is full of fatty acids, and fatty acids not only hydrate the scalp, but they soothe it, too. Use neem oil the same way that you would coconut or argan oils to treat dandruff. Apply it directly to your scalp and work it in. Let it sit on your scalp overnight (make sure to wear a shower cap to avoid damaging your sheets,) and wash your hair as you normally would in the morning. For the best results, use pure, organic neem oil, which you can find at a health food store or organic oil distributors.