Heavy metals are just one really heinous environmental toxin that gets into the nervous system and exponentially potentiates "negative" emotions (as well as being painful in ways that go far beyond what most people can conceive of and is associated with all manner of chronic illness and other infections all across the population...which is why the medical establishment shrinks away from the reality and calls people crazy, etc). It's messed up and only people who have experienced the detox in its extremes really know it--most people teaching detox are working in the dark. ...