Germanium

Germanium: The typical daily dietary intake of germanium is 0.4 to 1.5 mg. Foods high in germanium include wheat bran, vegetables, and leguminous seeds. Germanium as an organic complex has been touted, but not proved, as having anticancer properties in humans. Some organic forms of germanium are less toxic than inorganic forms. Inorganic germanium toxicity results in kidney damage. Some individuals consuming high amounts of organic germanium supplements contaminated with inorganic germanium stores have died from kidney failure.