How do you know if a pan is non reactive?

Online Answer
Aluminum, cast iron, and copper are all "reactive." Stainless steel, ceramic, glass, and metal cookware with enamel coating are all "nonreactive." Foods cooked in reactive pots will often pick up a metallic flavor and sometimes turn funny colors (this usually happens with very acidic or very alkaline foods).
Related Questions 📌
Aluminum, cast iron, and copper are all "reactive." Stainless steel, ceramic, glass, and metal cookware with enamel coating are all "nonreactive." Foods cooked in reactive pots will often pick up a metallic flavor and sometimes turn funny colors (this usually happens with very acidic or very alkaline foods).