Amaranth is a good source of carbohydrates and is packed with fiber. Amaranth grains are high in protein and other minerals like calcium, phosphorous, magnesium, iron, folate and selenium. The grains are also rich in antioxidants. An important aspect of this tiny grain is that it is gluten-free. According to modern research, Rajgira is a powerhouse that can help prevent several chronic health conditions such as heart disease, cancer and stroke. Its also helpful in treating inflammatory issues like arthritis.