I tried L-Glutamine for quite a few months but didn't notice any improvements but I do take the following...
bee propolis
omega 3-6-9
vitamin b12, A, C-Calcium Ascorbate
fibre supplements
probiotic calle primadophilus reuteri made by natures way
chamomile tea
all daily and my GI is impressed with how this combination has helped with symptoms so much, not full remission but a heck of a lot better than going the 30+ times a day with bleeding that I was having, now it's an average of 5 or less times/day no bleeding and fully formed stools.
My main issues are still frequency since I used to be a one/day pooper before CD and the other issue is urgency, I just cannot hold it in like I used to be able to before CD or even when I first got sick (I could hold it in better then compared to the last 12ish yrs) been sick for 18 yrs now with never having a full remission...
I'm also either allergic or non-responsive to traditional oral RX used for crohn's, so on top of the above supplements I've also altered my diet, no junk-food, fast-foods, processed foods/beverages, animal fats, caffeine, refined sugar/artificial sweetners.