According to reports, both sides are equally effective at heating your food so you can use any you prefer. However, this changes if the aluminum foil is labeled “non-stick” by manufacturers.
Furthermore, many people wonder why there is even any discernible difference between the sides of an aluminum foil if there isn’t any reason to be concerned. Experts say the difference is the product of a manufacturing process called milling, during which heat and tension are applied to stretch and shape the foil.
