To prevent aluminum from leaching into food when using aluminum foils, follow these guidelines: Avoid wrapping acidic foods like tomatoes or citrus fruits, as they can cause aluminum to leach. Do not use aluminum foil with high-fat foods, as fats can dissolve aluminum. Avoid using aluminum foil at high temperatures, as this can increase the risk of leaching. Instead, use parchment paper or silicone baking mats for high-temperature cooking. Always use heavy-duty aluminum foil, as it is thicker and less likely to break down and release aluminum. Finally, consider using alternative materials like parchment paper, silicone, or non-stick foils for cooking and food storage.