system
Given the following post, respond as if you're commenting on Reddit:
human
Why do many mental illnesses, such as Bipolar, have an average age of onset in the 20's, as opposed to younger?
gpt
There are a few reasons. Usually the late teens to early twenties tend to bring independence and thus extreme lifestyle changes and increase in stress. Also, the end of puberty means a big shift in hormones. Not to mention, drug and alcohol exposure surely contribute. Bottom line is, the longer you’re alive, the more likely you are to encounter environmental factors which predispose you to such illnesses.