Glucomannan can retain large quantity of water, as a result it expands, therefore less food is necessary for reaching satiety. We eat less, but we feel satiety instead of hunger. Its use does not have to be restricted to a special diet, it can be used during a normal, regular diet, but we will noticeably eat less, thus less calorie intake will contribute to a successful weight loss. Since this vegetable fibre cannot be absorbed, it reaches the intestines without degradation, and here it retains part of the fats and carbohydrates and reduces their absorption. Besides as it expands in the intestines it resorbs excrements on the intestinal wall, thus it cleans harmful substances from the intestine.