I had a chain email sent to me some time back now, not as a forward, but to check the facts. It was supposedly from Johns Hopkins University, spouted all sorts of medical nonsense about how our diets are killing us, and briefly shook my faith in humanity. I sent an email back explaining how some of what was written there just didn’t make sense from the scientific standpoint, provided a link to the Snopes.com article on the subject, and left it there, frustrated at the world.
The other day I saw an article that comments on this spam, and it goes through and breaks it down better than I ever could. Check out the smackdown, eloquently titled ZOMGCancer!!!!1111!!! at skepchick.org.