|Apply 2-3 drops of Red Onion Oil to the scalp of the affected area, and very gently massage into scalp. Leave on overnight or minimum 30 minutes before showering. Apply 2 to 4 times per week for best result. Onion Oil is Rich in antibacterial and antifungal properties, the use of onion for hair truly helps keeps hair loss at bay. Here are 10 amazing ways your hair can benefit from using Red onion oil: They are very good at hair follicle nourishment and help to restore lost hair . They are rich in Sulphur, which is known to minimize breakage and thinning. They have potentate-bacterial properties and help fight infections of the scalp. This in turn helps reduce hair fall as scalp infections can cause massive loss of hair. They are naturally potent antioxidants, which is why they help reverse the effects of premature greying. This vegetable lends a healthy shine to hair, which can become permanent when used regularly.