The health risks of using aluminum foil are minimal when used properly. However, there are concerns about aluminum exposure, particularly through ingestion. Aluminum can leach into food when foil is used to cook or store acidic or salty foods at high temperatures. While aluminum is not classified as a carcinogen, excessive intake may contribute to cognitive decline and Alzheimer's disease, although the link is not definitively proven. It's also important to note that the body naturally eliminates aluminum, so the risk is generally low for most people. To minimize exposure, avoid wrapping acidic or high-sodium foods in aluminum foil and opt for alternative cooking methods or materials when possible.