Sprouted bread is made from grains—wheat, rye, spelt, and others—that have been allowed to begin germinating before they are milled into flour. The grain is soaked in water, given time to sprout a small shoot, then dried and ground. That flour is what goes into the dough. It is not a shortcut or a marketing label; it describes a specific stage of the grain's life cycle at the point of milling.
If you have baked with whole wheat flour and wondered whether sprouted flour is just a fancier version of it, the short answer is: they are related but not the same. Whole wheat flour is milled from the complete, unsprouted kernel. Sprouted flour starts from a kernel that has already begun to change.

