Steel

Stainless steel contains a minimum of 11% chromium. It is characterized by superior biological cleanability.

An excerpt from the article 14 facts about steel

Such alloy is perfect for food or pharmaceutical purposes. It is worth mentioning that stainless steel is not completely immune to corrosion. It is generally considered to be biologically inert, but it can release small amounts of nickel and chromium during the preparation of highly acidic foods.

While nickel is known to increase the risk of cancer, there is no scientific evidence that stainless steel cookware can cause this disease.