Like everything else about true, lasting beauty, healthy hair begins within your body. Start with your diet. Include lots of green leafy vegetables and sweet juicy fruits. Dairy products such as milk and fresh yogurt will also help. Fresh coconut is also considered excellent "hair food" -- sprinkle grated coconut over salads, diced fresh fruit, or rice.
In order to preserve the health of your hair, you need to drink 1/3rd cup of aloe vera juice. Instead of this, you can also take 1 tbsp of aloe vera gel with a pinch of cumin thrice a day for 2-3 months.
Amla or the Indian gooseberry is an excellent tonic for premature white hair and preventing hair loss. Cut a few Amla fruits into pieces, dry it in shade and boil in coconut oil until the solid matter is well cooked and appears dark in color. This oil when massaged into the scalp every day, is the best medicine for premature graying of hair. Even the water in which a few dried pieces of Amla are soaked over night can be used for rinsing hair. This is very nourishing and helps prevent premature graying. Also massaging Amla juice, mixed with almond oil and few drops of lime juice every night is found to be beneficial in treating premature graying of hair.
You can use good quality coconut, almond or olive oil. Ayurvedic hair oils also contain some of the herbs mentioned earlier. Apply some mildly warmed oil to your hair and gently massage into your scalp evenly with your fingertips. Leave on overnight if you can, if not, leave on for at least an hour or two, then get it out by shampooing your hair. The scalp massage helps you relax and aids sound sleep as well.