Red onion is a great source of sulfur. Sulfur is found within amino acids, which are components of keratin. Keratin is known to be sulfur-rich are needed for growing strong hair. When added to the hair and scalp, AroMine red onion hair oil can provide extra sulfur to support strong and thick hair, thus preventing hair loss and promoting hair growth. The sulfur from this oil also helps to promote collagen production. Collagen in turn helps the production of healthy skin cells and hair growth. Onion oil also helps to boost blood circulation. Applying this oil to the hair and scalp could increase blood supply to hair follicles, which in turn improves hair growth.