German artisan bread is full of seeds, and they are good for you! Seeds are smart carbs, high in good stuff like protein, fiber and minerals, and low in bad stuff like sugar and fat. That's what you want!
Bread based on sourdough is given a lot more time to rise, which allows the sourdough bacteria to create positive side effects, like making gluten, minerals and nutrients more digestible. Sourdough's acidity also keeps bread fresh a lot longer.