Vitamin B12 is a water-soluble vitamin that helps support red blood cell formation to prevent anemia. Vitamin B12 is also essential in making new hair cells and can help stimulate the regeneration of lost strands. When working properly, B12 helps eliminate dry and damaged hair with less breakage and hair loss. With the increase in oxygen to your hair follicles from vitamin B12, you will notice fuller and thicker hair after supplementing immediately. Vitamin B12 is also used to help with certain health issues such as lack of energy, Nutritional support for vegans, and Immune system support.