To prevent aluminum from leaching into your food when using aluminum foil, follow these tips: 1. Avoid wrapping acidic foods like tomatoes or citrus fruits, as they can cause aluminum to leach. 2. Do not use aluminum foil in direct contact with food at high temperatures, such as in the oven or grill. 3. Use the dull side of the foil to wrap food, as the shiny side is more likely to leach. 4. Opt for heavy-duty aluminum foil, which is less likely to break down and leach. 5. Consider using alternatives like parchment paper or silicone baking mats for wrapping or lining baking sheets. By taking these precautions, you can minimize the risk of aluminum leaching into your food.