Spelt is a wheat that has not been modified to meet commercial interests. It is an intensely wheat flavored flour, low in gluten and suitable for some people who are intolerant to wheat. Ancient grains typically contain more minerals,and have a generally better nutrient profile than modern grains. Overall, spelt flour is an excellent flour to add to your rotation of healthy flours for diet variety and health.  In the wide world of whole wheat flours, spelt performs the closest to all-purpose white flour while bringing a lot more flavor.