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A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.
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I guess it's similar to cooking in cast iron - it's effective, just not a be-all-end-all solution.
It'd have to be unseasoned bast iron. The polymer seasoning resists coming off and contains very very little iron.
We put ferrous iron in cereal; most supplements use iron salts, though. The metal salts are generally FAR more available for the body to take up.