Lead, mercury, arsenic, and cadmium are major toxic metals. All are environmental pollutants that can inflict harm on humans and other living creatures as well as adversely affect our air, water, soil, and food supply. They can poison not only us but also our progeny developing in the womb. They can break down the body's basic functions. This book describes the unique characteristics of each of the four major toxic metals, identifies the likely sources of our exposure, and offers in-depth, evidence based information, methods to test for its presence, and therapies to rid ti from our bodies.