American bread brands tend to have a lot of sugar in them. I've had a few foreign friends that have commented on just how sweet all the bread here is.
It isn't that you can't find low sugar breads in the US, but rather it can be something that hard to even know you should be looking for. Just because a bread is whole grain won't make it healthy.
Germans also tend to really like whole grain and dark breads. Rye bread in particular is something a lot of germans like.
Nope. It goes bad quicker because it doesn't have shelf stabilizers.
If anything, sugar increases how fast bread goes bad.
It's pretty hard to know exactly how much sugar is in those big round loaves, harder than the national brands with the nutrition label.