I know I've said it before but S really does believe that the EN formula pumped him up. He used to work out before crohns (so about 15-16 years old) and never built up much muscle (possibly partly due to his upward growth spurt and then the early stages of crohns). Then lost 25 lbs at diagnosis, so had to regain that weight but, once he regained those 25 lbs, he kept gaining... and as he gained strength, he started exercising more with weights (really just going back to what he'd been doing before getting sick, so no new special program) and then started to see real results! Much more than he'd seen pre-crohns. So, while part of it may have been due to the growth spurt/crohns dx, S was/is convinced it was the EN formula that really helped him build up bulk. His height hasn't changed much since dx (ie 1 inch??) but, to give you an idea on weight change - 140-145 pre-sickness, 125 at diagnosis, 135 after 6 weeks EEN, 155 after another 6 weeks of supplemental EN and then over the next few months to 160-170 lbs (and stable since...). But, just so that Jack doesn't expect these same exact results
immediately, S was diagnosed just before turning 17 so this filling out/bulking up gain happened at 17-18 years old - probably the age range that any teen boy will begin to develop a more 'manly' body anyway (the EN formula probably just helped this process along).
Throughout this period, S was taking in 1500 cal/day, 5 days per week (with no exception! - if he had to miss EN because of vacation, I elminated the 'off' days in the weeks before and after the vacation to make up for it) in elemental formula for 2 years!
I'll try to find pictures of S in Grade 8, grade 10 and recent that show the difference and post later.