I'm having a hard time figuring out your point for this specific situation. Are you saying the list of symptoms I described would eventually go away by itself?
It's not that there's a regression-to-mean force that eliminates abnormal symptoms. It's more that the symptoms have some underlying cause that will fix itself over time.
If you start some intervention (such as stopping caffeine) at the same time you are naturally getting better, then you nay false attribute your getting better to the intervention rather than to its real cause: our bodies tend to bounch back from illness.
