I'm glad you started this thread, Stephen. I saw your post on this topic in another thread and thought of starting a new thread to address this issue myself. I don't have any research or studies, but I have noticed anecdotally that I am less hungry when my digestion is better. When my digestion is crap, (sorry for the pun) I can eat alot more and not be satisfied. I think this is how, as a child, I was able to eat pretty massive amounts of food on a regular basis and remain very thin. I still do throw down pretty hard on food, but I fast most days so I pretty much have to in order to meet my body's needs. I think I notice the appetite-digestion effect more since incorporating near-daily fasting, as fasting of course makes you more aware of your hunger level (not saying that fasting makes you famished, but you are just more in-tune with your true appetite). I've noticed that if my intake of green vegetables falls too low, my digestion suffers.