Cooper cookware can leech dangerous amounts into your food of cooper. I personally wouldn't use it and although I haven't done much research but I've heard of issues. My grandpa and some aunt's/uncles has Wilson's disease causing cooper buildup, my dad isn't a carrier meaning I'm safe. My dad does have primary hemochromatosis (high iron) and has to remove/donate blood every so often. So he's unable to use any iron pans. I might have high iron now but I never got a blood test before and had low iron a few years ago by symptoms only. While menstruating you lose blood meaning iron so that might be why I don't have high iron. Right now I'm only using carbon steel or cast iron pans. I use glass or enameled casserole for baking. I have some cake and muffins pans that's nonstick but I don't use them often and they're still in good condition.