What it is
Cast iron is molten iron poured into moulds and cooled. Bare cast iron is porous and reactive; a seasoned pan carries a polymerized oil layer that turns it into a nonstick, low-reactivity surface.
Enameled cast iron adds a vitreous glass coating that eliminates seasoning maintenance and prevents rust.
Why it matters
It holds and radiates heat like almost nothing else, which is why steakhouses and bakers love it.
A modest amount of dietary iron leaches into food — meaningful for some people, negligible for most.
With basic care, a good cast iron pan outlives its owner. It is the definition of a 'buy it for life' pan.
Common uses
- Skillets, dutch ovens, griddles
- Bread and pizza baking
- Camping and outdoor cooking
Safety considerations
- Bare cast iron is not ideal for long-simmered acidic foods (tomato sauce, wine reductions) — the acid strips the seasoning and pulls more iron into the food.
- People with hemochromatosis (iron overload) should consult a clinician before using bare cast iron daily.
- Enameled cast iron sidesteps both issues but adds cost and eliminates the natural nonstick surface.
Where you meet it in the home
- Kitchen — daily skillets, dutch ovens, baking vessels
- Outdoor — grill and campfire cooking
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Frequently asked questions
Does cast iron add too much iron to food?
For most adults, the added iron is small and often beneficial. People with iron overload conditions should get medical advice.
Can I use soap on cast iron?
Yes. Modern dish soap does not strip a well-cured seasoning. Avoid long soaks and dry the pan immediately.
Editorial references
- USDA — Iron in cast iron cookware
- National Center for Home Food Preservation — cookware guidance
Last updated 2026-07-18.