Using aluminum foil to cook and prepare food can be bad for your health, according to research conducted by Ghada Bassioni and her colleagues. Aluminum foil can leach into your meal, especially when cooking acidic or spicy foods at high temperatures. This increased exposure to aluminum can pose risks to human health, including Alzheimer's disease and harm to bone diseases and brain cells. The research recommends using alternative materials such as glassware or porcelain for cooking.