Amaranth is high in protein and has an abundance of nutrients like calcium, iron, magnesium, phosphorus and potassium. Also, this is the only grain to have vitamin C. High on iron, this grain also has a positive impact on anaemic patients. The vitamin A in it improves vision and prevents night blindness. Zinc, a mineral known to boost your immune system, is found in this grain, making it suitable for children and older individuals who may be more susceptible to allergies and infections.