Most people focus on eating negative calorie foods, which basically comes to include fruits and vegetables.  But there are some who would tell you that in order to really lose weight, of course you don’t want to just eat negative calorie foods, but you should focus on eating specifically water rich vegetables.  Obviously, in fruits, watermelon for example would be rich in water.  But in vegetable terms, it’s more like cucumbers, zucchini, tomatoes, and otherwise. 

These can be used in salads, soups, just by themselves, or otherwise.  They give you more water, which naturally works to hydrate your body to some degree.  But it also works to lower the calories you are actually taking in while still providing you with vitamins, antioxidants, and other nutrients in general.  This will help your body to lose weight faster in general, especially if you are actually eating soups instead of solid foods.  They keep your stomach full for a longer period of time than water alone would, and they have various other benefits that water wouldn’t have while including the benefits of water in its simple form.  So they’re doubly effective in certain ways and can therefore have greater appeal to many.