Tough questions. I'll take a stab....
1) l-glutamine has been studied for its benefits for Crohn's. Seems to me what I read was positive, though I don't have any studies bookmarked to post for you.
2) Hard to say which protein drink is easiest on the stomach, I would just steer clear of soy-based ones. Many folks are sensitive to soy. I recently purchased a rice protein based one for my daughter. It had no lactose and no sugar or artificial sweeteners. Seemed like a good choice...
3) Eggs contain all eight essential amino acids including l-glutamine. Google and read about
them! They've gotten a bad rap which they don't deserve, and there's nothing better than a natural source for your amino acids! Since my son began eating more eggs he really has put on muscle.
4) The 24 hour home-made yogurt put forth by the Specific Carbohydrate Diet (SCD) is a great source of protein, is lactose-free, and adds high-quality beneficial bacteria to your intestines, which everyone in the world needs--most of all anyone with intestinal issues! This is what my son uses for his "protein body-building drink" in the form of smoothies. He consumes about
2 cups of SCD yogurt every day (he's a competitive swimmer).
Good luck to you!
Mom to 16 year old son diagnosed in June, 2007.
Omega 3s, digestive enzymes, probiotics, vit. C, calcium w/D3, a good multivitamin and SCD legal yogurt
Started The Maker's Diet in Sept. '07. Incorporate Specific Carbohydrate Diet (SCD) recipes, too.