I've started to wonder the same thing myself. I had 3 weeks of constant D, and didn't lose a single pound. I figured at least I'd have something good come of it, but no! I seem to eat less than I used to, but a couple pounds jump on board here and there. I didn't know if it was age catching up to me, or the meds.
31 yr old female-dx with Crohn's in '97 after emergency resection and appendectomy, 2nd resection '05
Currently on Humira, Prilosec, Effexor, Calcium, Vit D, sublingual B12