I read somewhere that Adderall does not improve cognitive function in people without ADHD and in some cases can even decrease it.
The same is true for every individual person who takes it. At some dose it helps and at other does it doesn't.
And in the gym, it raises your heart rate so that hurts exercise, but without it I can't do any cardio because I get so bored 5 minutes in I have to stop.
>takes amphetamine
>performance enhanced
>welp, guess I have ADHD!
By this metric everyone has ADHD.
Have you ever taken a decent dose of an amphetamine? It isn't going to make you smarter but it will almost certainly boost your energy and ability to get stuff done.