The ingredients that are in Heinz no added sugar tomato soup make it not as healthy as homemade tomato soup.
But according to the nutrition label of the Heinz no added sugar tomato soup it's pretty healthy when it comes to canned tomato soup.
Canned tomato soup is not considered as healthy because of the way it's made and the use of ingredients that are not considered healthy such as the use of GMO ingredients, sugar, High Fructose Corn Syrup, lots of salt, tomato paste or concentrate, some brands may use milk solids, or whey.
Some may use soy or soy oil, preservatives, and flavors.
So that's the reason canned soup including canned tomato soup is considered not healthy as homemade tomato soup but even canned soup can be healthy in moderation.