I understand that glutamine taken by itself is free-form. And I agree there's not a lot of benefit to taking FF Glutamine alone, unless you have a catabolic stress disorder or severe digestive problems (in which you're usually given something else to treat those).
That didn't really answer my question about Excell.
Overall, my point was that glutamine is not "worthless." Maybe l-glutamine by itself/free-form, but what about the peptide/protein bonded glutamine, and the different esters (n-acetyl-glutamine, alanyl-glutamine, glutamine-ethyl-ester)? No one ever actually said free-form glutamine.