system
Given the following post, respond as if you're commenting on Reddit:
human
Dear Askscience, how small of a dose of arsenic, a day would i need to take to develop an immunity to it?

I'm a fit, Caucasian, 18 year old male who weighs about 65kgs. how much (how little) arsenic, over how long would i need to ingest for me to become immune to future assassination attempts? is there a mathematical model that can be applied? will this mathematical model work for other poisons? is it even possible to become immune to a poison such as arsenic? Thanks for your help :)
gpt
Quick rule of thumb. Repeated exposure to poisonous metals makes you sicker not stronger.

This is particularly true for the heavy metals like lead or mercury that build up in your system and can't be flushed out without medical intervention.