Eliminate Heavy Metal Toxins Naturally Some metals are necessary as these are minerals our body meeds. Most heavy metals are toxic and cause cancer, thyroid problems, learning disabilities, neurological problems, hormone imbalances, and many other health problems. Heavy metals are found in the foods we eat, the air we breathe, in buildings, clothes, machinery, tap water, dental fillings and cooking utensils, just to name a few. Over half the US population have too much heavy metals in their b.