Quote Originally Posted by Aggie_Ama View Post
Oddly, you cannot donate if you have Crohn's disease that is active or you are on therapy. I cannot figure that one out, someone please explain it.
When you say "on therapy", do you mean "taking medication"? That would be why they wouldn't want your blood for the moment...

They might also worry that if you're already having a Crohn episode giving blood would further trouble your system, route precious bodily resources towards making new blood instead of keeping yourself together, etc...