Amaranth whole is a good source of fiber, protein manganese magnesium, phosphorus, and iron with several other important micronutrients. It contains antioxidants, eating Amaranth whole could reduce inflammation and may lower cholesterol level.. Organic Amaranth is a high protein seed, amaranth was a dietary staple used by the ancient Aztecs and Mayans. But the word amaranth comes from the Greek word amaranths meaning unfading flower or one that does not winter due to the flower keeping its vibrant color well after it is dried. Amaranth grain is high in protein and lysine, an amino acid found in low quantities in other grains. Amaranth whole is free of gluten, which makes it a viable grain for people with gluten intolerance.