system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is mercury so dangerous?
gpt
Mercury replaces calcium, sodium, and iodine in body chemistry, disrupting the workings of these dependent bodily functions. For example, your thyroid will absorb mercury instead of iodine, it will disrupt your immune system functions. Your body uses calcium and sodium to transfer oxygen through cell membranes, mercury disrupts this transport system; it raises cell PH. Mercury causes inflammation.