Spirulina Wheat Grass & Barley Grass are on a weight for weight basis among the richest natural food sources of minerals. Enzymes B Vitamins antioxidants & chlorophyll & are often described as Green Superfoods. Wheat grass barley grass & spirulina are all rich natural sources of nutrients & are also often described as superfoods. Spirulina yields more nutrition per acre than any other crop or livestock making it an ecologically sound choice.