Ancient grains spelt, einkorn and emmer have more nutrients in it and are supposedly easier to digest than modern “over bred modern grains. Common wheat varieties are bred to have large grains and they need more fertilizers for growing. Due to that those varieties are genetically less diverse and prone to plant diseases. Ancient varieties can grow in less fertile soils and demand less fertilizers.
I started experimenting with baking buckwheat bread because I couldn´t find any edible bread in the supermarket. Most of them just look way too fluffy and I find myself thinking what might the percentage of air they are selling with it.