The present invention relates to a method for the treatment and/or prevention of overweight in a monogastric mammal. More particularly, the invention is concerned with such a method comprising administering to the mammal a liquid edible composition with a pH of more than 5, a viscosity below 50 mPas at a shear rate of 100s^-1 and 20 C., and a viscosity of at least 125% of the aforementioned viscosity at a pH 3 and a temperature of 37 C.; and with a caloric density between 0 and 500 kcal per liter, the composition comprising: between 0.01 and 5 wt. % of one or more polysaccharides selected from the group consisting of pectin and alginate; and between 0.01 and 3 wt. % calcium