Three of us tried this product. One found it worked well, if a little violently, on 4 capsules a day. The second person found 11 or 12 capsules were needed to get 3 to 5 bowel movements a day. The third person found it did not work at all, even after increasing dosage by 2 cpsules a day (as recommended) up to 11 capsules at night AND 11 capsules in the morning. Still no effect. So, it works well on some people and not on others.