The Real Reason Aluminum Foil Has a Shiny Side and a Dull Side (Page 2 ) | February 10, 2025

What About Food Safety?

This is another question people often ask. Whether one side of the foil is safer for food contact? The good news is that both sides of aluminum foil are food-safe. There’s no chemical difference between the shiny and dull sides. So, whether you’re freezing leftovers or grilling veggies, you don’t need to worry about which side touches your food.

However, please that foil shouldn’t come into contact with highly acidic foods, like tomato sauce or citrus, for extended periods. Acid can cause the aluminum to break down slightly, leaving behind a metallic taste—or even tiny amounts of aluminum in your food.

When Does the Side of Foil Actually Matter?
There’s only one situation where the shiny-versus-dull sides of foil make a difference: non-stick foil. This specialized type of foil has a coating on one side, and the dull side is usually marked as non-stick. In this case, you’ll want to follow the packaging instructions to ensure you’re using it correctly.

 

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