I had a friend who became a believer in MonaVie which is sold via multi-level marketing also known as MLM. She had tried to sell me on it, but I did my research. The best resource on the web that I found was this page at the Lazy Man and Money blog
. He just updated this page. It's a good resource to pass along to anyone who becomes a believer in not only MonaVie, but on any MLM scheme.