Ancient grains refer to a group of grains that have been cultivated for thousands of years and are considered to be more nutritious than modern grains. These grains include quinoa, amaranth, teff, millet, buckwheat, and sorghum among others. They are often gluten-free and contain higher levels of protein, fiber, vitamins, and minerals compared to traditional grains like wheat or rice. Ancient grains have become popular in recent years due to their unique taste, nutritional benefits, and the fact that they can be used as a substitute for other grains in many recipes.