...and thanks for the feedback. The book is " The Cure For All Diseases " by Dr. Hulda Regehr Clark. Priceless.
All the cleanses outlined in the book and in the main CureZone page contributed to the total removal of brain fog. But fact is, I started taking MSM (methylsulfonylmethane) before doing the cleanses (in 2000, actually) and it helped immensely with Fibro pain, migranes and brain fog (this last one reduced by some 90% over one week-end!) I did have, though, the roughest Herxheimer reaction one can imagine; still, I lived to tell the story. Actually, I've been wanting to post it in the MSM forum for months now, but never got the time - it's a long one.