To paraphrase the great Bob Seger in Against the Wind, it's all about "what to leave in, what to leave out". So you include fats, meats, low carb vegetables. And you leave out grains, starchy vegetables, overly sweet vegetables.

If you must buy store bought instead of making your own, look for chicken and vegetables rather than chicken noodle or chicken with rice. Better yet, buy plain vegetable soup and add some chicken.

Storebought soups use cheap ingredients (starches, sugars) and charge a lot for them. You are much better off to make up some broth when you're feeling well, freeze it to have on hand. Add meat and veggies (and some of Thud's shirataki noodles if you can find them) and you are sure to feel better for eating it.

Hope you feel better soon.