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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?
BlueMetalChick
26-30, F
21 replies 39 views Dec 18, 2017
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SW-User
It comes in too small of traces to be picked up by a metal detector.
+ 1 · Reply · Translate · Dec 18, 2017
BlueMetalChick · 26-30, F
@SW-User Good thing, that, or else we'd beep every time we went to the airport.
+ 1 · Reply · Translate · Dec 18, 2017
SW-User
@BlueMetalChick Very true..
+ 0 · Reply · Translate · Dec 18, 2017