Cast Iron Skillet

Cast iron is essentially pure iron with a layer of polymerized cooking fat — the seasoning — baked into the pores of the metal. There are no synthetic coatings, no PFAS chemistry, and no off-gassing at any cooking temperature. When properly maintained, the seasoning layer forms a naturally non-stick surface that actually improves with use over years and decades.

The one material transfer worth understanding is iron leaching. Cast iron does release small amounts of dietary iron into food, particularly acidic dishes like tomato sauce or wine-based braises. For most adults, this is a benefit — iron deficiency is the world's most common nutritional deficiency. For people with hereditary hemochromatosis, a condition causing iron overload, cooking acidic dishes in bare cast iron may be worth limiting. For everyone else, it is a non-issue.

Seasoning maintenance is the main practical concern. A stripped or poorly maintained pan has a rough, reactive surface that can impart a metallic flavor and is more prone to leaching. The fix is straightforward: after each use, dry thoroughly on low heat, apply a very thin coat of high-smoke-point oil, and store it dry. Avoid prolonged soaking in water or the dishwasher, both of which strip seasoning and cause rust.

Cast iron is heavy — typically 4–8 lbs for a skillet — which is worth considering for those with wrist or grip limitations. For most households, a well-seasoned cast iron skillet is among the safest, most durable, and most versatile cookware investments available at any price point.