Vitamin B6 or pyridoxine is a water-soluble vitamin that contributes to the formation of red blood cells and maintains normal metabolic function. As a cosmetic ingredient, this B-group vitamin has sebum-regulating properties and helps balance oily skin.
It is widely used in the formulation of shampoos and anti-oily dandruff products, as it helps to reduce scalp flaking for healthier looking hair. In hair loss products, it increases the availability of this micronutrient in the hair follicle, which has a "nourishing" effect on the scalp.