While some cookware is manufactured and used in its raw state, others require a non-stick coating to enhance their use, or simply to make it possible to use them in a way that is safe for your health. In fact, depending on the material they are made from, some cookware cannot come into direct contact with food or preparations. This is particularly true of aluminum, widely used in the manufacture ofcookware for its lightness and excellent heat conduction. Certain acidic foods in contact with aluminum can cause a reaction harmful to health, which is why most aluminum frying pans and saucepans are coated! On the other hand, other types of cookware, such as stainless steel cookware, present no risk if left untreated.