Source Naturals EMERALD GARDEN ORGANIC CHLORELLA is cultivated under strict USDA Organic regulations, ensuring a superior form of chlorella. EMERALD GARDEN ORGANIC CHLORELLA is a nutritious, vegetarian source of protein, containing seven of the eight essential amino acids. It is one of the richest sources of chlorophyll in the plant world, making it one of the few plants in the world that both nourish the body and cleanse it as well. Chlorella contains carotenoids, minerals, growth factors, and vitamins that support the immune system while energizing the body. The tablets are 100% pure organic broken-cell walled chlorella.