Research has found that grey hair is primarily caused by a buildup of hydrogen peroxide at the root of hair follicles and that this is due in great part to a reduction in the natural antioxidant compound catalase. In addition to helping cleanse the scalp and follicles, onion juice also promotes the production of catalase. Catalase prevents grey hair as well as promotes thicker hair follicles. It is also shown to work for the skin condition vitiligo.
How-to: Divide your hair into four sections, then apply the onion juice on your scalp not on your hair. Massage gently and leave it on for 15 minutes till 1 hour, then rinse you hair well. Apply it daily and after 2 weeks ( at least) you may see great results. Shampoo afterwards to help remove the onion odor.
Some helpful links with more information on gray hair & baldness remedies:
Vitamin H is also known as Biotin.
Sources of vitamin H include: almonds, peanuts, pecans, walnuts, cauliflower, bananas, organ meat, & egg yolk. Raw egg whites contain a protein called Avidin that interferes with the body’s absorption of biotin.
People who are deficient in vitamin H may suffer from neurological disorders, growth retardation and skin abnormalities such as: hair loss, dry scaly skin, cracking in the corners of the mouth (cheilitis), swollen and painful tongue that is magenta in color (glossitis), dry eyes, loss of appetite, fatigue, insomnia, and depression.
The average adult should be getting 30 mcg/day of vitamin H. Vitamin H may help hair re-grow(if lost due to diet), strengthen fingernails up to 60-90%, and possibly help those with diabetes mellitus.