Vitamin B12 is found almost exclusively in animal products, so vitamin B12 supplementation makes sense, especially for vegans and vegetarians. Since the water-soluble vitamin can be stored in the liver for about 3 years, a deficiency only becomes noticeable later. Vitamin B12 is involved in numerous metabolic processes in the human body . The functions of the vitamin at a glance: Vitamin B12 ... contributes to a normal energy metabolism contributes to the normal functioning of the nervous system contributes to normal homocysteine ​​metabolism contributes to normal psychological function contributes to the normal formation of red blood cells contributes to the normal function of the immune system helps reduce tiredness and fatigue has a role in cell division The Nutri-Plus Vitamin B12 lozenges are therefore ideal for a vegan or vegetarian diet .