I'm using it for more than 7 years and know it has amazing cleaning properties on the body, so that the immune-system is relieved and that the body can start healing itself! More info here: http://mmswiki.is/index.php/Main_Page The best way to investigate is reading testimonials and listening to people who used it. You could download his book for free in the past,... can't find no free copies anymore now,... Search on Jim Humble and you will find a lot about it!