I recommend to my clients that they do not undertake any detoxification program without first making sure that their colon is going to be able to handle the burden of eliminating those toxins from their body. If the colon is not functioning correctly, toxins will build up in the bloodstream and overburden the body. The body will feel quite ill, and it can be a very dangerous situation.
How do I determine if a colon is working correctly? I ask how about a person's bowel habits. Many people consider themselves "normal" if their bowels move once every day or even every other day. Folks, this is not "normal", nor even desirable. What's best for the body is that you have a bowel movement for every meal that you eat during the day, which usually means 3 or more a day. Yep, you read it right.
So, if you're not operating this way, I'd say you're constipated, and I'd put you on a diet to get that colon working more regularly BEFORE we do a cleanse.
Fiber is the key; especially insoluble fiber. That's the kind of fiber that doesn't break down in the digestive process--it acts like little scrubbers as it moves through the digestive tract, carrying waste material with it. You get this kind of fiber from raw vegetables, psyllium seeds and husks, the skins of fruits and vegetables, and seeds. Also important to note: when you're eating a high-fiber diet, drink adequate water! You need water to move the food through your body. Eight 8-ounce glasses of water a day is a good amount.