This product is very helpful for getting stubborn bowels to move regularly. I take anywhere from 2-5 capsules, depending on the effect I need, but around 2-3 is a good dose for me to maintain regular daily bowel movements. I feel the effects the morning after the first dose, so it has immediate effect. As a nutritional therapist I often recommend Oxypowder to my clients with sluggish bowels, and this tends to be the product that works when everything else they've tried hasn't.