Sourdough vs. whole-grain bread: what is the difference?
Sourdough and whole grain describe different things. Sourdough refers to a fermentation method; whole grain means the grain kernel retains the bran, germ and endosperm. A loaf can be white sourdough, whole-grain yeast bread or whole-grain sourdough. For fiber and grain nutrients, flour composition comes first; sourdough adds fermentation-related changes such as acidification and possible reductions in phytate and fructans.