there have been rumours that acid stays in your system for years. this may be true, or it may be a mixup with the fact that it permemnelty marks your hair and other protien buildups. i dont knwo ti the same applies for shrooms tho
everything will leave your system unless its a metal plate or a bullet or some other large and dense object. Acid stays in your system a good while but eventually your body flushes it out.
no standard drug tests even test for them and im pretty sure they leave your system quicker than 3 days
Seemingly acid never leaves your system. It will for a normal drug test obviously but I think traces of it stay in your spine forever.