I do a cleanse every year, but I've never had the dramatic results some people have. But then... even though I eat meat, I also eat a lot of veggies and fiber and I don't do junk food or sweets very often. I've never felt the boost of energy that some people do, but then I don't get that with vitamins or supplements like other people do, either.
Here's what I use, but there are lots of other good products out there.
http://www.drnatura.com/
And here is a link that compares different products.
http://whydietsfail.eponym.com/?source=google/Dr.Natura
Something that I've been using for the last month that I'm really happy with is the new Benefiber supplement that you can add to foods or drinks. It has no taste and doesn't change the flavor or texture of the food. I've been keeping it on the counter so that I remember to add it to things when I'm cooking. I got it at Costco. Here's another link.
http://www.costco.com/Browse/Product...=1&topnav=&s=1
(sorry for such a long URL... I don't know how to make it shorter on this forum...)