system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is actually happening in my body when I build a tolerance to something like alcohol?

Is the digestive system just recognizing what I am taking in faster or is my liver storing up what it needs in anticipation of more alcohol or what?


EDIT: I am truly sorry. I see numerous good responses to this, but have yet to determine whether or not this is actually answered due to drinking. I will flag it as soon as I am sober and feel that I am clear-headed enough to make such a decision.
gpt
It's a physical response. When your body is introduced to a toxin (alcohol), it responds by making more of the enzyme that gets rid of it. This is regulated epigenetically. Your body literally gets better at dealing with it which is why it takes more and more to get drunk.