Onions contain organic sulfur compounds. Nutrients in the onion nourish the hair follicles, which increase volume, shine, and improve hair strength. The extra nutrition also minimizes breakages and thinning.
The sulfur in onion oil provides the hair with the nourishment it needs to grow. It also increases the growth phase of the hair. Its antibacterial properties might help keep your scalp away from infections, further promoting healthy hair growth.Applying onion to the hair and scalp could increase blood supply to hair follicles, which in turn improves hair growth.