Various heavy metals are commonly ingested through the food that we eat, even though the Environmental Protection Agency warns that there is no safe level for any heavy metal in the body. Toxic metals commonly stored in the body at high concentrations are arsenic, cadmium, lead and mercury.
Aluminium enters the body from vaccines, anti-perspirants, aluminium foil, antacid medications, aluminium cookware, etc.
Arsenic enters the body from rice and rice products, commercial chicken feed, pesticides and fungicides (this is why I always suggest soaking rice and rinsing well before using)
Mercury enters the body via pollution from batteries, air conditioner filters, broken thermometers, cosmetics, dental amalgam fillings, and especially large fish such as tuna, shark and swordfish.
Nickel enters the body via braces and dental crowns, air pollution, batteries, cigarette smoke, cosmetics, fertilisers, fuel oil combustion, hydrogenated fats and oils (margarine, fast food, commercial peanut butter and shortening, imitation whipped cream), industrial waste, oysters and shellfish, stainless steel cookware (makes it shiny), and occupational exposure.