Onion juice has sulphur that is said to prevent thinning and breakage of hair. Lesser hair thinning and breakage will ensure thick hair growth.
Onion juice mildly nourishes hair follicles with the help of sulphur. Nourished hair follicles will allow regeneration of healthy hair.
The presence of antioxidants in onion juice may help reversing premature greying of hair.
Its antibacterial properties might help keep your scalp away from infections, further promoting healthy hair growth.