“Okay, we're going to get started now. First, I'm going to tell you the book that I've been working on next is Detoxification. And I get a lot of people from the internet, you know, the Yahoo groups, who talk about heavy detoxification and doing heavy detoxification. So my methods of detoxification are usually to take a food that you've eaten in the years of eating cooked foods, you ferment it and eat it. What you are doing is introducing bacteria that is absent in the food that you've eaten cooked. So you've got no way to recycle it out of the body. So your body has to make solvents like virus to dissolve that toxicity and remove it gradually, very gradually and slowly. So in the detoxification book, I'm telling people how to gradually detoxify. And that's by taking those foods, how to ferment them and how to eat them and in what quantities. So this week, I mean two weeks ago, I decided to push the envelope to see how much of a detoxification was too much. I did it. I drank, I took some, well I was in Vietnam three weeks ago. They have sugar cane juice and you can get it anywhere, almost anywhere in Asia. And of course I was a sugar junkie. I was diabetic and I used to put down, you know, a whole box of chocolate covered cherries in one afternoon and lots of candy and lots of powdered donuts. I loved all that stuff. I was a sugar freak. I became diabetic. So I decided I was going to detox the sugar that had been in my system. So I fermented the sugar cane juice. Well, I had diarrhea for about five days on and off while I was in Vietnam. During that, I got tremendous hives everywhere. And I used to get hives all the time so badly that it burned my skin and the blister and scabs would fall off. And it was mainly around my kidneys, all the places where a diabetic is most affected. So it was all along here I had huge marks still coming out my ass. I lost, my complete ass dropped in a week. I had this beautiful round ass and it was gone in a week. You know how much sugar was stored in those tissues. It's not there. No ass.” In summary, his method worked really fucking well

Examples he gave of the approach:

For past heavy sugar consumption: Fermented sugar-cane juice produced strong symptoms including diarrhea, hives concentrated around diabetic-affected areas, and rapid loss of tissue.
In general: Heavily fermented raw milk (2+ weeks fermented, alcohol-smelling) produced multi-day diarrhea, significant weight loss, mineral/metal release, and urinary stones.
For past grain/carbohydrate consumption: soak the same grains (e.g., rye if that was the bread eaten) in water for about three days until they begin fermenting and show a little mold, then consume only a small amount of the bread covered in the mold but not to consume a piece of bread covered in extra mold from other parts of the bread, only the amount that grew on it.

So it seems the main method is to take a bad or unideal food you consumed/overconsumed in the past and ferment it raw then consume it. The food could be literally anything. He said not to do it until you are strict on the diet for at least a year.

Things he mentioned but we don't know exactly what the methods are:

Forced vs. natural detoxification: In the February 12, 2005 workshop he described the book he was writing as covering “detoxification. Forced and natural,” so readers would “understand what it is you’re going through if you get a tapeworm or pinworms or anything else.” He added that he had spent the prior year preparing material on “both natural and unnatural detoxification.”
Biotoxins / biocontaminants. In “Loss Of My BIOHAZARDS Research” he stated: “My long over-due book on detoxification was going to include much information on biotoxins. I spent 22 years collecting data on all types of biocontaminants.” (That research was later destroyed by a computer virus.)
Handling accidents and injuries: In the April 11, 2004 Q&A, while describing his own serious car accident, he said the questions that arose during the event (what to do if unconscious, how to deal with doctors, broken bones, concussion, etc.) were being answered in the book he was writing: “That’s why I’m putting it in the book. See, that’s why when I was writing the book I had these questions. They’re all answered. Every question I had. That’s why I can take people step by step, you know, through it.”
Fermented foods for specific residual toxins: In the September 12, 2004 Q&A he noted the book would “get into foods that are fermented” for breaking down difficult substances such as plastics or hardened fats from past cooked vegetable oils, and that he was still researching precise applications (e.g., fermented vegetable juice or sauerkraut) so as not to cause overly intense reactions.