Spirulina blue-green that is refered to as a superfood. The spirulina home page states:
This tiny aquatic plant offers 60% all-vegetable protein, essential vitamins and phytonutrients such as the antioxidant beta carotene, the rare essential fatty acid GLA, sulfolipids, glycolipids and polysaccharides.
Its deep green color comes from its rainbow of natural pigments - chlorophyll (green), phycocyanin (blue) and carotenoids (orange) - that harvest the sun's energy. Easy-to-digest so nutrients are absorbed quickly.