L- Glutamine

Glutamine, commonly referred to as L-Glutamine, is the most abundant amino acid found in our blood system, and makes up around 60% of the amino acid pool in our muscles. It is considered conditionally essential, meaning that in certain situations its synthesis can be limited. This requires the amino acid to be (in majority cases) consumed in the diet via food or supplementation.
Supplementation in this case is of course recommended, as living in the 21st century, where majority of our food is highly processed, the nutrients we were once able to receive and trust, are lacking today. Now the question is, what does Glutamine actually do? This amino acid is ultimately known for its role as a substrate for protein synthesis. This means that it is used during skeletal muscle contraction when we exercise, and without its presence, our hard work and effort in the training space, may be hampered.
This amino acid is an important anabolic ancestor for muscle growth following exercise. When we perform strenuous activity, such as resistance training, especially eccentric training, or training for a marathon, cycling and so on, the glutamine level in our body decreases substantially. This is why supplementation is of the utmost importance, as if glutamine homeostasis is altered, it is likely that the aim for muscle growth during these exercises will be limited. Regardless of whether you are looking to add mass or lean the muscle out, the presence of this amino acid is necessary.  The resulting effect on performance will be reduced strength, reduced power, reduced endurance and a longer time to recover sufficiently. This is not a desired effect.
In total summation, why should you supplement with L-Glutamine? More lean muscle development, quicker recovery, less muscle wastage, reduced fatigue, improved power and endurance, and less muscle stiffness post workout. It’s a no brainer where to from here in your supplement stack.