If we have metals like iron and zinc in our blood, why doesn't that set off metal detectors?

Is it too small an amount of metal? Or is it because it's tiny particles of it instead of a big chunk?

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Metal detectors aren't sensitive enough to detect those trace amounts.

[youtube=https://www.youtube.com/watch?v=IVsWTkD2M6Q]

this video will probably tell you everything and more than you wanted

BlueMetalChick · 26-30, F

@SwarmSona Ooh, thanks.