Onions are rich in vitamins C, B-complex, sulphur, magnesium, potassium and calcium.
Onion juice may regenerate hair follicles, reducing hair loss and stimulating hair growth.
Onion has antibacterial properties that clean the scalp and boost circulation. Onion juice for hair growth hasn't been well-studied, so more research is needed.
Several studies show onion boosts hair growth. It is caused by B6, C, folate, and quercetin. These compounds reduce hair loss and dandruff.
Some research links onion juice to hair growth. Indirectly, onions contain sulphur, a protein needed for new hair growth.
Onions contain minerals and antioxidants that can help hair. Onions may promote hair growth and repair dry or damaged hair.