GSN Spirulina 300mg/120 tablets. Spirulina is native to the salty lakes in Mexico. These waters are rich in sodium bicarbonate and other salts of potassium and magnesium. Spirulina is a microscopic single-celled algae of the family of blue-green algae, coil and measuring between 0.1 and 0.3 mm. You use the whole dried and micronized seaweed. Spirulina is a rich source of protein (62%), essential amino acids, vitamins, unsaturated fatty acids, mucilage and minerals like selenium and iron. Composition per tablet: Spirulina, micronized algae and dehydrated (Spirulina maxima S.G.) 300 mg SPIRULINA tablets GSN, rapid disintegration, contain no yeast, soy, sugar or salt and are made without preservatives, colorings or flavorings.