Cast iron pans are popular, especially for searing, and are generally safe to use. But they can leach iron, which is a strong pro-oxidant. Those genetically at risk for iron overload should learn more about cast iron safety. For well over a thousand years, cast iron has been used as a reliable cooking surface.
Unless you have existing health concerns about iron, there's no worry with cooking consistently on cast iron. The amount of iron you ingest is fairly negligible and goes does the more you cook as the seasoning develops.
The type of iron that comes from cast iron cooking is nonheme iron and is safe to consume. It is the same type of iron as found in plant sources such as beans, spinach and tofu. Children one to three years old only need 7mg iron daily, so if it's best not to cook every meal for children this age in cast iron cookware.
You can't over-season cast iron so season as often as you'd like, but don't go crazy thinking you need to season your cast iron every Sunday. Clean and maintain your cast iron properly and your cast iron will continue to look and perform fantastic.
The more you use a rusted pan, the more iron you'll consume in your food. It's best to avoid cooking with a rusty cast iron pan. If it's reached the point of corrosion or deep rust, throw it away rather than risk your and your family's health.
Clean your cast-iron skillet each time you use it. Doing so prevents stuck-on food from staying on the skillet between uses. If the skillet is only slightly dirty, a quick wipe after cooking in it will work. If dirtier, or food is stuck, then scrubbing it is best.
Cooking in cast iron cookware can offer potential health benefits. Cast iron leaches small amounts of iron into food during cooking, which can contribute to meeting dietary iron needs, especially for individuals at risk of iron deficiency.
For long-term care, it is best practice to oil an iron skillet after each use. A well-seasoned skillet has a distinct look to it. It is noticeably dark with a shiny, semi-gloss finish. Of course, if you rarely use your cast-iron skillet, oiling it only two to three times a year will work.
Cast iron cookware has a naturally nonstick finish.
With each use, you'll see the performance get better and better.
The short answer is yes!
Cast iron cookware's disadvantages include its heavy weight, the need for seasoning and maintenance, potential reaction with acidic foods, and lack of slickness for delicate cooking tasks.
Cooking with cast iron can increase iron intake, potentially benefiting iron-deficiency anemia. However, frying in cast iron can lead to the formation of trans fats. Teflon (PTFE) coating in nonstick cookware has raised health concerns due to the release of toxic gases and chemicals at normal cooking temperatures.
“The most nontoxic cookware that you can buy is stainless steel, cast iron or carbon steel; things that don't have a coating on them,” says Alexis Pisciotta, culinary purchasing and events manager and cookware consultant for Food Network.
From a food-safety standpoint, the surface of a cast iron pan during cooking easily reaches upwards of 300 degrees, which is high enough to kill any bacteria that don't get washed away. You will not get sick from maintaining your pan this way.
Cast iron is not only safe for everyday cooking but also offers several health benefits. When properly seasoned, the surface becomes virtually non-stick, reducing the need for excessive oil or fats in cooking.
Eggs fall into the category of sticky foods that are not ideal for cast iron skillets that haven't built up their seasoning yet. While cast iron can become non-stick with sufficient use over time, a newer skillet will almost certainly cause your eggs to stick to its porous surface.
All cast iron, whether natural or coated, has a much higher carbon concentration than other popular food-safe metals like stainless steel and aluminum. This means that natural cast iron is more susceptible to corrosion because when carbon combines with oxygen and water, rust forms.
All in all, you'll want to do this oiling-and-heating process three to four times, to set down a good initial layer of your own seasoning. Once you're done, just let the pan cool down. It's now ready for cooking.
Common cooking oils like olive oil will gradually produce seasoning, but won't be as effective as grapeseed oil. Canola, other vegetable oils, and shortening are a little better.
Stainless steel pans are known for their smooth surfaces, which can make them easier to work with when cooking delicate items like eggs or fish. They are also less prone to sticking than cast iron pans, which can make them a better choice for tasks like sautéing or frying.
Cast iron pans can leach a sizeable amount of iron into your food, exceeding dietary intake in some cases. Acidic foods will contribute to much more leaching while an old, heavily-seasoned pan will leach much less iron than a newer one.
“Glass, like Pyrex cookware, is a safe option,” Perko said. “Cast iron is a safe option if NOT frying or using high-temperature cooking. If you have or can use or purchase stainless steel pots and pans, they are healthier choices for long-term/lifetime use.”
Cooks for generations didn't use soap on cast iron pans because the soaps were made with lye and vinegar, two ingredients that will absolutely strip the seasoning and can even damage the pan's iron. Today's aerosol oven cleaners are often made with lye or sodium hydroxide.