Is there any evidence that test can slow you down mentally? I don't think as sharp, lose concentration etc.. I know all roids effect people in different ways, but I think its a bad combo for me to study and cycle at same time. I am currently doing a degree and I wish I never started this cycle because I can't sit still and concentrate. Someone recommended Adderall to counteract this problem, but I am not sure where to get in UK. I know its not available in most of Europe.