Well - those who sell detoxification gimmicks/books don't even tell what toxins they eliminate. Depending on the detoxification-scam they are pulling, toxins can settle anywhere in the body. Some quacks will sell foot pads for toxin extraction. Others prefer the other end of the body, and sell candles to stick in the ears. Others advice coffee enemas, because they believe this will extract toxins from the bile (sigh).
For those who firmly believe in the existence of these toxins the answer is, that they are settled in their minds.
@ Susan Friar: I do understand why all this talk about toxins in the bowel may sound convincing. But as it happens, my job as a pathologist is to examine bowels on a daily basis (I'll spare you for the details). Toxins are not present in the bowels I get to examine.
Both ear candles and foot pads can easily be shown at home not to extract toxins. But apparently you are not using those anyway, so I don't think I will go into details with these simple experiments here.
@ Dr.T: The links Susan Friar refer to are to sites, where colonic irrigation and coffee enemas are promoted as a ways of eliminating toxins. I think we can both agree that what a colonic hydrotherapist points at and explains as toxins being eliminated is the same I see when I open up a bowel (segment) right after surgery. I stand by my words. But feel free to provide data showing that discharge from colonic irrigation contain toxins which are also deposited within the body, thus causing health disturbances. I would also like to remind you that coffee enemas as a way of eliminating biliary toxins has its roots in conventional medicine. It had been in use in conventional medicine since 1917, and was still in use in the early 1970s. It was abandoned because data showed it to be useless.