I realize this post is 2 years old, so I'm assuming Ultimate Nutrition's Muscle Juice probably changed their formula. According to their product information listing on a dealer's site, this product contains the peptide bonded glutamine, and would therefore be suspect (quote and website source below). Does anyone use this product and have up to date info on whether or not it's gluten-free? Seems like a good product if it is.
"....In addition to the precursors to glutamine present in this protein, you get 1000 mg of glutamine per serving which includes the breakthrough L-Alanyl-L-Glutamine. This powerful dipeptide may protect against muscle degradation and provides fuel for exercise to help you go the distance."