Flaw in low-calorie food??

I'd been looking for something filling and yet low calorie and i found this Campbell's Instant Soup. It's less than 100 calories and fills up about a mugful of soup. It's quite filling cause it's hot too.

Thing  is, i'm not sure whether it's healthy or not. I mean, being instant soup and all, might contain preservatives that isnt very healthy.

What do you guys think?

its probably incredibly high in sodium

I have cupa soup quite often but never as a meal replacement. Its good every so often when you start craving food but not particularly healthy. BUT my reasoning is that its better than binging on high calorie food thats far worse.

My local supermarket sells fresh soup that is under 125 calories per bowl and looking at the ingredients its far healthier than the instant and has no words i cant pronounce.

There are plentry of low calorie foods out there that are good for you such as fruits,veg and grains.

A medium jacket potato for examle is 150cal and ive heard some fantastic recipies for kale and sweet potato chips on CC.

Never confuse "low calorie"  with "healthy". These terms are not synonymous. Your instant soup is high in preservatives unless it came from the freezer, high in sodium and most likely, void of any nutrients. Instant "cup-a-soup" is not healthy. It is a convenient, snack-food treat. A healthier way to fill up on 100 calories would have been a large apple, a large portion of carrots or a yogurt.

Now, this isn't to say you shouldn't eat these soups, it's simply to remind that while it is low in calories, it certainly cannot be considered healthy.

If you enjoy cooking at all (or at least have access to a ktichen at home with a big pot) you can make a big pot of vegie soup (there are lots of recipes on this site, or the WW site, or google "0-point" soup) that will be far healthier than any packaged or canned products. About once a month I make a clean out the vegetable drawer pot of soup that I can make as low-sodium and non- or low- fat as I like.  I then freeze it up in 1-cup servings in small zip-loc bags.  I can then microwave a bowl whenever I need a hot snack, or as a first course for a light meal.  The soups I make usually calculate out to about 50 calories per cup, are high fiber, full of nutrients, and remarkably tasty/satisfying.

Homemade soup is best, but some of the cartons of veggie soups are pretty healthy (outside of high sodium). 

e.g.  I had the Knorr Red Soup for lunch today and its ingredient list starts with tomatoes (even before the water) followed by various other veggies, fruits, veggie/fruit juices, spices, a little cornstarch and olive oil.  The downside is that they tend to be pretty pricy unless you catch them on sale.