Glutamine

Got some Body Fortress Glutamine today.  Supposedly, taking one dose before a hard workout and another afterwards should slow muscle breakdown and speed recovery.  

Reviews on the web are mixed - example: http://forum.bodybuilding.com/showthread.php?t=171886 - however, most of these articles and reviews come from body building forums as opposed to ones focused on hard aerobic & performance training.

We shall see ...