"The only safe situation for glutamine use is in the vigorous athlete. Glutamine is used as a muscle fuel, so that vigorous exercise will consume most of the glutamine before it can accumulate in the brain. I would still avoid long-term use in high doses. I would caution readers to avoid excess glutamine, especially in the above named conditions and situations."
I did read right but did NOT see, all of which you posted. It can be potentially harmful, if ingesting too much! So, then it is safe for the athlete, which I am not, in this time :D (working on it slowly though)! I add 1 t. to my greens drink, so I will just use it, as a month on/off, type of protocol.