This special blue-green algae (spirulina plantensis) is a low fat source of numerous vitamins, minerals, carotenoids, and essential fatty acids, and an excellent source of many nutrients. Spirulinas cell walls do not contain cellulose to slow down digestion. Spirulina supplies all nine essential amino acids, including sulfur. Source Naturals SPIRULINA. MULTIPLE combines spirulina with additional vitamins and minerals, to provide a days worth of nutrients in just two tablets. 6640SKU 21078000013