Teflon pans . . . get rid of them. They contain forever chemicals.
Ceramic-coated pans? Some lead in these. If you heat them up too much, you're going to get some pitting. Not good.
Likely the most used in the world is stainless steel, but not all stainless steel is created equal. 18/0 is preferable to 18/10. 18/10 is more corrosive resistant but nickel, the corrosive-resistant metal, is a neurotoxin and can cause allergies. If it's 18/0, the magnet will stick; if it's not 18/0, the magnet will not stick.
Cast iron, the Buyer B series because they coat it with wax so there's never any mineral oil or toxins on these. Or a completely ceramic by Surema, super nontoxic, great for sauteeing.
