Get a green boost to your health with Swanson 100% Organic Spirulina! An optimum source for antioxidant protection that will boost your immune system's health and vitality, organic spirulina ranks as one of nature's most powerful superfoods. At over 60% protein, spirulina is the most potent and digestible source of vegetarian protein! This member of the blue-green algae family packs in a whole lot of antioxidant and phytonutrient nutrition along with high amounts of beta-carotene, essential amino acids, minerals, B vitamins and chlorophyll. Spirulina is also rich in gamma-linolenic acid (GLA).