METALLOESTROGENS are certain metals (aluminum, antimony, arsenite, barium, cadmium, chromium, cobalt, copper, lead, mercury, nickel, selenite, tin, vanadate) included in a new class of xenoestrogens physiologically related to functioning estrogen. Replacing estrogen in body processes these mimic estrogen by activating the receptor. These are considered harmful for hormonal cancers, PLD and more.