L-glutamine is a very important amino acid to recover the muscles. It’s almost 60% of our musculature and when we are in a regimen or with a lot of physical activity, we generally spend more glutamine of what we can restore with our own food, even if we are following a regimen with high quantity of proteins. In times of stress or low caloric consume, it wouldn’t be a bad idea to add a glutamine supplement to your diet.