Vitamin B Complex Tablets B1, B2, B3, B5, B6, B12, Biotin & Folic. VITAMIN B COMPLEX : Vitamin B Complex contains 8 essential B vitamins to maintain the right balance needed by the body. All 8 B Vitamins combined support different roles in the body but all work in unity to maintain a Healthy Nervous System, Cognitive Function and support Optimum Energy levels by converting Carbohydrates into fuel (Glucose) which the body uses to produce energy.