What foods should not touch aluminum foil?

Certain foods should not come into direct contact with aluminum foil due to potential reactions. Acidic foods like tomatoes, citrus fruits, and vinegar-based items can react with aluminum, leading to a metallic taste and possible leaching of aluminum into the food. Additionally, salty foods can also cause similar reactions. To avoid these issues, it's best to use parchment paper or other barriers when cooking or storing these types of foods in aluminum foil.