Honestly, I probably can't help much because I don't live in the states, but I just look at the ingredient list and make sure the bread has at least 9% dietary fiber. And that it's whole wheat or rye. Also, the more goodies you have in your bread (like, if you buy nut-bread or olive-bread or tomato-bread), they obviously have less carbs and more fibers/good fats. Hope it makes sense to an American, not sure how these things are called in the US.
Your current safe boundaries were once unknown frontiers.
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