Aluminum foil is generally considered safe for cooking, but there are some concerns and precautions to be aware of:

1. Leaching: Aluminum can leach into food, especially acidic or salty foods, and high-heat cooking can increase leaching.

2. Oxidation: When aluminum foil comes into contact with air, it can oxidize, forming a thin layer of aluminum oxide, which can transfer to food.

3. Reactivity: Aluminum can react with certain foods, like tomatoes, citrus, and spices, causing flavor and color changes.

4. High-heat cooking: Using aluminum foil at very high temperatures (above 400°C/750°F) can lead to the release of toxic fumes.

5. Wrapping acidic foods: Avoid wrapping acidic foods like tomatoes, citrus, or vinegar-based dishes in aluminum foil, as the acid can react with the foil.

To use aluminum foil safely:

1. Choose heavy-duty foil for high-heat cooking.

2. Avoid wrapping acidic or salty foods.

3. Use a barrier (like parchment paper) between food and foil.

4. Avoid overheating or burning food.

5. Don't use aluminum foil for microwave cooking (use microwave-safe containers instead).

Remember, moderation is key. If you're concerned about aluminum foil safety, consider alternative cooking methods or materials, like stainless steel, cast iron, or ceramic. "

~Oyintareladoh Buesni.