Carbon steel is the same as cast iron, just with a lower carbon content. Both are only going to leach carbon and iron directly. Arguably though, the seasoning i

Carbon steel is the same as cast iron, just with a lower carbon content. Both are only going to leach carbon and iron directly. Arguably though, the seasoning itself is probably some kind of polymerized hydrocarbon, and so you might leach polymer into your food when cooking on a well-seasoned cookware.