Since glutamine is the most abundant and used, but most required amino acid in the body, it is essential that you supply your body with a steady stream of this substance. Proteins are being built up and broken down continually and Glutamine is a nitrogen donor which plays a pivotal role in the formation of other amino acids - the
building blocks of proteins. L-Glutamine supplementation may top up the levels of available free L-Glutamine ready for protein synthesis when catabolism or
muscle breakdown occurs.
I would supplement it by taking 3-5 gram doses every few hours throughout the day (but especially right after your workout and right before going to bed)...up to even 40 grams a day if you are lifting extremely hard and have a tendancy to become catabolic easily. But you have to make sure to do everything else right as well...like eating clean and getting plently of rest.