This is not the intended purpose of Natural Calm. The laxative effect of magnesium is your guide to how much to take. Anything above the amount needed by the body will be eliminated through the bowels, kidneys or through sweat. According to the National Institute of Health, the recommended daily allowance for Magnesium is between 310 and 320 milligrams for adults of average weight (or approximately 2.2mg per lb. of body weight), thus Natural Calm taken as directed should not have a laxative effect. Bodies differ and “one size” does not necessarily fit all. If a recommended dose on the bottle label is causing loose stools or diarrhea, simply cut down the dose or break it up into 2-3 doses through the day.