Onion juice is believed to be a brilliant home remedy for thinning hair and premature greying recently, the researcher found that grey hair is chiefly caused by a buildup of hydrogen peroxide at the base of the hair follicles and a decrease in a natural antioxidant compound, called catalase. onion juice promotes the production of this compound.
Step 1- Apply onion juice onto your scalp, massage.
Step 2- Leave it on for about 30 minutes to an hour.
Note: Repeat the process daily for a few weeks.