High Vitality Liquid Multivitamin is the best vitamins for energy. The eight B vitamins thiamin, riboflavin, niacin, pantothenic acid, B6, biotin, folate, and B12 provide the most energy, as they aid in cell metabolism, help the body transform carbohydrates and fats into energy and carry energy-nutrients around the body. Phoenix Nutritionals have other targeted vitamins for energy.