The main purpose of slimming soup is to make you eat less and absorb less calories. Slim soup itself is made of all kinds of vegetables, with very low calories and no oil. Drinking slimming soup without eating other foods will make you lose weight, but at the expense of health. If you eat slimming soup or eat as usual, you won't lose weight, and maybe you will gain a little. To put it bluntly, slimming soup is a kind of food that replaces normal diet and keeps people from starving to death.