Low end stainless steel cookware, mixing bowls, stockpots and accessories are usually 18/0 which are usually not highly polished, and could be subject to some rust spotting. There are many varying qualities of stainless steel, don't skimp on quality, buy only the better ones. The principal elements in stainless that have effects on our health are iron, chromium and nickel. Although nickel is poisonous in large quantities, only trace amounts go into the food; not enough to make a difference. Except if you're allergic to nickel. Stainless steel cookware makes the preferred choice for any kitchen. Cookware often is intended for all-purpose use. That’s why it is important to buy one made of materials you can subject to a variety of cooking methods. It contains chromium, and may contain nickel, molybdenum or titanium, which give to stainless steel cookware special hardness, resistance to damage from high temperatures and scratching. Cookware made from superior quality stainless steel is durable, will not permanently crumble or smear.