Each daily dose contains 177 nrv of vitamin b12 contributes to normal energy yielding metabolism and function of the immune systemeach daily dose contains 77 nrv of vitamin a contributes to the maintenance of normal skin and visionall organic natural ingredients made using only the finest grade herbs spirulina is a blue green freshwater algae and is one of the most nutritionally dense foods in the world it is a natural source of protein and vitamins with it being especially high in v