Onion juice for hair is a natural remedy obtained by extracting the juice from onions (Allium cepa). It has been used in traditional medicine for centuries to nourish and beautify hair.
Onion juice contains sulfur, which is essential for healthy hair growth. It also has antibacterial and antifungal properties, making it effective against scalp infections and dandruff. The practice of using onion juice for hair care has been documented as far back as ancient Egypt.