You can use a magnet to show that there is iron in your cereal. From Steve Spangler's website "Many breakfast cereals are fortified with food-grade iron (chemical symbol: Fe) as a mineral supplement. Metallic iron is digested in the stomach and eventually absorbed in the small intestine. If all of the iron from your body were extracted, you’d have enough iron to make two small nails." To see the website click here.
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