you buy a book by Kevin Trudeau. As soon as I saw his book title, "Natural Cures 'They' Don't Want You to Know About", I knew he was a joke. Yet people bought tons of it, despite the utter lack of scientific evidence to support any of this claims. He has another book out, "More Natural Cures", which is equally as bad. Both try to get you to pay for his website for more info. Trudeau is a true sleazeball. If you'd like to get an idea of what kind of crap he's peddling, and a scientific response, head over to Respectful Insolence.