Supports normal energy yielding metabolism contributes to the reduction of tiredness and fatigue suitable for vegetarians vegans complete b provides an excellent source of b vitamins to support normal energy yielding metabolism and the reduction of tiredness and fatigue thiamin b1 riboflavin b2 niacin b3 vitamin b6 and vitamin b12 also contribute to the normal functioning of the nervous system supports normal energy yielding metabolism contributes to the reduction of tiredness and