personally I haven't felt anything like this yet (i'm 22) but still I make sure I'm clean during final exams and stuff just in case it might affect me. I have found that when i'm using something my focus tends to drift away from normal stuff like; school, going out on weekends, hanging out with friends, shopping (except for food), studying etc. and shifts toward counting meals, protein, updating my training log religiously, eating perfect. At cycles end my friends always remark that they haven't seen me in a while, my clothes are getting old (not that they fit anymore anyways), my car hasn't been washed, so it might just be a natural reaction that your focus is elsewhere