That's interesting that you mention that. I have ADD and I've taken Adderall for most of my life to treat it. One of Adderall's most common side effects is supp

That's interesting that you mention that. I have ADD and I've taken Adderall for most of my life to treat it. One of Adderall's most common side effects is suppression of the appetite. On the days I don't take it I also feel like I'm able to concentrate way better when I'm dehydrated and my stomach is empty. I've always figured that's just because my body has adjusted to the side effects of Adderall after many years, but I'd be curious if there's any research that associates a lack of gut activity with higher concentration because I feel the exact same as you.