Holland & Barrett B Complex & B12 Tablets are suitable for vegans & vegetarians. It contains Vitamins B1 (Thiamin), B2 (Riboflavin), B12, together with Niacin, and Protease. B vitamins support normal energy yielding metabolism and contributes to the reduction of tiredness and fatigue. Vitamin B12 contributes to normal red blood cell formation, normal homocysteine metabolism and has a role in the process of cell division.