Considered an ancient grain, Amaranth is a great source of nutrition. It has high fibre at 15%, high protein at 14% and can be used in many ways. It also contains high lysine, an amino acid found in few foods and higher calcium than most other grains. The best reason to eat amaranth is for its high nutritional value, but it also can become a staple food in the diets of people who are diabetic or have celiac because of its low glycemic index value and lack of gluten. Premium Quality.