system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What makes the iron in food stuff like spinach digestible in our body? How is it different from consuming small quantities of iron directly?
gpt
It's really not different. It's a common grade school experiment to take some iron rich cereal or something and spin it in water with a strong magnet for a long time and you eventually end up with a bunch of stuff that is just iron filings stuck to the magnet.