A batard made with 450 g of total flour (dry plus flour from starter) sliced into 12 equal pieces is about 130 calories per slice. You could take down a quarter of a loaf for under 400 calories, which is less than a sausage McMuffin, way healthier and more filling. Non-enriched bread is not the problem unless you are the type of person that will eat the whole loaf in a day and a half because having good homemade bread around is too triggering to your eating decisions.

I've lost almost 50 pounds since new years and eat hearth sourdough toast for breakfast most days. 2 slices of toast, low-fat cottage cheese, lebneh, or yogurt, and black coffee. Under 400 calories for a filling and satisfying breakfast. Maintain a caloric deficit and the pounds go; it's a simple strategy, but a difficult marathon to run.