no. somethin about the iron not being crystalline or in a metal state.

I don't think so.

The size of something does affect how much magentic force it can exert.

I know someone who accidentally underwent MRI with their phone still in their pocket. It didn't go flying across the room or anything, despite containing permanent magnets.

The phone was VERY dead after, but no injury occurred.

It does depend on the machine, I think. More sensitive and powerful MRI machines can have orders of magnitude more powerful fields.

I saw this exact scenario play out in a documentary about enhanced humans. There was a guy who was magnetic or something. He called himself The Magnet Guy. He didn’t seem like a nice chap. Even so, he is fabulous.

A whole package of Quaker Quick Oats with iron, which are the most iron-rich cereals i could find in a quick search, has about 20mg iron per serving * 13 servings = 290 mg iron. So no, there's no risk of injury at 4 boxes of cereals per gram of iron. We humans don't need to replenish iron that much (if we don't suffer from major blood loss), we are pretty good at internal recycling.

No, but if you eat 3-5 bananas before a radiation measuring, you'll read high exposure.

You already have iron in your blood. If the iron in the food you ate that morning could be pulled out by the machine, there would probably be no safe way of ever using such a machine period.

I took 75mg of iron or so 48 hours before an mri and couldn't feel anything. Not right before, but I take it your body does absorb it fairly quickly and then it becomes fairly non magnetic

I mean, surely not, but I've seen videos of people blending up cereal and using a magnet to pull out the iron. I'm really curious now

I don't think it would cause any problems. I've taken iron supplements of 1000 mg and had MRIs done and nobody ever gave me a warning about anything wrong with it. Surely iron in even lower and more distributed amounts does nothing too.

I'm sure it can't possibly go wrong