The best one is P & B but some people don't like the taste of bentonite. I think you can start with psyllium and drink a lot of water (at least 2 litre a day) . you can also start with taking lemon juice first thing in the morning ( juice of one lemon + hot water) it helps to cleanse your liver , bowel and increase your bowel movement. Other Bowel Cleanse I have tried are ultimate cleanse and super cleanse. they are very good , too.