Tomato soup has 30 kcal and 4 g sugar per 100 g. Cooking concentrates the lycopene-related compounds — heat processing increases tomato bioavailability vs raw fruit (Fielding et al., Mol Nutr Food Res 2005). The trade-off is sodium at 33 mg per 100 g.
How should I track Tomato Soup, low sodium, with water?
Prepared foods like Tomato Soup, low sodium, with water can be tricky to track because the actual serving you get often differs from the label. Restaurant and deli portions are typically 30–50% larger than the stated serving size. A meta-analysis of dietary reporting (Wehling & Lusher, Am J Clin Nutr 2021) found that people underreport calorie intake by 25–30% on average — and prepared meals are a major contributor. The safest approach: weigh your actual portion as served. Also note that homemade and store-bought versions of the same dish can differ significantly in calories due to cooking methods and ingredients used.