We use Ginger to help grow black hair, it works.
1. Cut the ginger to thumb size and peal the skin.
2. Slice into few thick flat piece.
3. Heat both side
4. Using ginger to rub your hair where you want to grow hair three times a week.
Another Method, Proven in Scientific Studies: Onion Juice
The patients were divided into two groups. The first group [onion-juice treated] consisted of 23 patients, 16 males (69.5%) and 7 females (30.5%). Their ages ranged between 5–42 years with a mean of 22.7 years. The second group [control; tap-water-treated] consisted of 15 patients, 8 males (53.3%) and 7 females (46.6%). Their ages ranged between 3–35 years with a mean of 18.3 years.
The two groups were advised to apply the treatment twice daily for two months. Re-growth of terminal coarse hairs started after two weeks of treatment with crude onion juice. At four weeks, hair re-growth was seen in 17 patients (73.9%), and, at six weeks, the hair re-growth was observed in 20 patients (86.9%) and was significantly higher among males (93.7%) compared to females (71.4%) P<0.0001. In the tap-water treated-control group, hair re-growth was apparent in only 2 patients (13%) at 8 weeks of treatment with no sex difference. The present study showed that the use of crude onion juice gave significantly higher results with regard to hair re-growth than did tap water (P<0.0001), and that it can be an effective topical therapy for patchy alopecia areata.Source: Onion Juice (Allium cepa L.), A New Topical Treatment for Alopecia Areata
Dihydrotestosterone (DHT), a derivative of the male hormone testosterone, is the enemy of hair follicles on your head. Simply put, under certain conditions DH wants those follicles dead. This simple action is at the root of many kinds of hair loss.
Some Nutrition which helps are Zinc, Silicon, Copper, Selenium etc.