Dietary supplement for a flat stomach with probiotics, prebiotics and apple cider vinegar flavored with an apple and a sweetener from the stevia plant. Flat Belly is a formula containing the following nutrients: probiotics (Lactospore Lactobacillus sporogenes), which are live microorganisms that live inside the gut. Fructooligosaccharides (prebiotics), such as inulin from chicory, which are used as probiotic feed. Apple cider vinegar is a traditional ingredient used since ancient times and has numerous benefits.