Muscles

Quick fact. Ready?
Glutamine is a special amino acid that the body naturally produces and stores within muscle tissue. This AA helps with muscle recovery, muscle glycogen and protein synthesis, and helps to combat the increasing acidity that occurs during intense workouts.
We get about 1-6 grams from high protein foods, however this is often times not enough for intense marathoners, weight lifters, are athletes of any kind.

Quick fact. Ready?
After about 2 hours of prolonged training is when our body begins to dip into protein as 5-15% of our energy source. These proteins, in particular, are our BCAAs, which are stored in the muscles themselves.