Copper-Rich Foods
A copper-rich diet can help your body naturally restore melanin in your hair. Some foods include almonds and cashews, chickpeas, liver and oysters. Cereals, meat and fish generally contain up to 50 percent of the required copper intake for a balanced diet; add nuts or seeds like poppy or sunflower to make up the rest.
Iron-Rich Foods
Eating foods rich in iron can help, too. Dark green vegetables like spinach and kale or yellow fruits like bananas and tomatoes are excellent sources of iron.
Coconut Oil
Coconut oil is one of the healthiest oils for your scalp. Not only does it help prevent lice and dandruff, it also promotes the regrowth of damaged or graying hair. Massaging this oil into the hair roots and scalp can stimulate natural melanin production. You can also combine this oil with lemon juice or Indian gooseberry (also known as amla) for an additional melanin boost to your scalp.