Metal leaching from cookware and water

There is no reliable scientific evidence that putting pieces of iron, silver, or gold in water or cooking vessels provides health benefits, and doing so can carry risks. Iron: Traditional "iron fish" or similar iron objects can increase iron content in boiling water or acidic soups, but the amount of iron released is unpredictable and may lead to excess iron intake or contamination. Iron deficiency should be treated with proven methods such as iron‑rich foods or prescribed supplements, guided by laboratory testing. Silver: Silver is not an essential nutrient. Colloidal or ionic silver can accumulate in the body, interfere with medications, and is discouraged by health agencies (e.g., FDA, WHO). Silver vessels may leach minute amounts of silver, but this offers no proven health advantage. Gold: Gold is not a human nutrient. Edible gold is inert and provides no therapeutic effect. Overall, safer alternatives for cooking and drinking include food‑grade stainless steel, cast iron (which can modestly add iron during acidic cooking), or glass. Meet micronutrient needs through a balanced diet and medically indicated supplements rather than by adding metals to water or cookware.