Quinoa: With 8 grams of protein per cup, it’s a nutritional powerhouse. Quinoa is one of the few plants that contain a complete protein. This grain is also gluten-free and is a good source of iron. Amaranth: This tiny seed contains all essential amino acids, making it a plant source of complete protein. It’s also gluten-free. Polenta: Polenta made from organic corn is a good source of vitamin C and a pair of antioxidant carotenoids (lutein and zeaxanthin). And it’s yet another gluten-free option! Kamut: This ancient wheat is higher in protein, selenium, zinc and magnesium than modern wheat. Millet: Millet is high in fiber, iron, B vitamins, manganese, phosphorus and magnesium, while also being gluten-free. Buckwheat: You’ll get all nine essential amino acids, including lysine and arginine. Plus, it’s a very good source of manganese, while also packing ample amounts of copper, magnesium, fiber and phosphorus. And despite “wheat” in its name, buckwheat is actually wheat-free and gluten-free! Brown rice: Brown rice is a solid source of manganese, as well as selenium, phosphorus, copper, magnesium and niacin