system
Given the following post, respond as if you're commenting on Reddit:
human
Since the human body is widely influenced by ion channels in the cell, does magnetism affect this at all? Would prolonged exposure to magnetism have any effect on one's health?
gpt
Well, the strength of MRI ( Magnetic Resonance Imaging ) is limited by their ability ( when strong enough ) to stimulate nerves via this principle. They operate just at the stimulation limit. It is not uncommon for patients having a MRI to experience facial tics or muscle twitches due to this. 

It is theoretically possible that if the magnetic flux were increased, that a MRI machine could cause serious problems, such as heart arrythmia, breathing problems, etc.

Mind, this is "Acute" exposure to incredibly strong fields.