Spirulina is a natural, blue-green algae that harnesses energy from sunlight to fuel its growth. As one of the most protein-dense plant foods available and a rich source of micronutrients, it really is one of the world's best, and original, superfoods. Cultivated and harvested in pure, freshwater pools, our minimally processed spirulina is dried into a naturally nutritious powder. Spirulina Powder is HIGH IN IRON which contributes to the normal function of the immune system and HIGH IN PROTEIN which is the macro-nutrient that contributes to the maintenance of normal bones and the maintenance of muscle mass. These tablets are made by compressing 100% pure organic Spirulina powder into tablets.