What is the function of aluminum foil in food storage?

Aluminum foil serves multiple functions in food storage. It acts as a barrier to air, which slows down oxidation and spoilage, helping to keep food fresh for longer. It also prevents freezer burn by providing a protective layer around frozen items. Aluminum foil is heat-reflective, which can be used to cook or reheat food evenly in the oven or microwave. Additionally, it can be used to wrap food for easy transportation or to cover dishes to keep them warm. It's important to note that aluminum foil should not be used with acidic or highly salty foods, as it may react with the foil and potentially leach into the food.