B vitamins support normal energy yielding metabolism b vitamins support the reduction of tiredness and fatigue food supplement which is an excellent source of b vitamins suitable for vegetarians and vegans b vitamins support normal energy yielding metabolism vitamins b1 b2 b3 pantothenic acid b6 and b12 and the reduction of tiredness and fatigue vitamins b2 b3 pantothenic acid b6 b12 high strength mega b 100 is an excellent source of b vitamins including thiamin b1 ri