L-Glutamine L-Glutamine – Real Muscle Food. L-Glutamine is non-essential and conditionally essential in humans, meaning the body can usually synthesize sufficient amounts of it, but in some instances (such as intense exercise), the body’s demand for glutamine increases and glutamine must be obtained from the diet. In fact, glutamine is so important to the body, it is the most abundant amino acid found in the blood. The impressive resume of L-Glutamine A variety of investigations have provided evidence that glutamine has become an important and, possibly essential, amino acid during certain times. This switch to becoming an essential amino acid appears when the demand of the body for glutamine increases markedly. The plasma glutamine use exceeds the glutamine synthesis of the skeletal muscle and the liver in catabolic conditions. Circulating glutamine is an important substrate for the enterocyte, hepatocyte and immune cells as an oxidative fuel as well as a substrate for nucleotide synthesis. Why should I take the ATP Science l-Glutamine? Benefits of ATP Science L-Glutamine are: Allergen, pesticide, heavy metal and microbial tested for compliance An approved material manufacturer that will allow audits of their factory HPLC verified guaranteeing fully efficacious material and no contaminants or adulteration Vegan Gluten free GMO-free Sugar-free Dosage Common doses used by athletes range from 1 to 5g of glutamine pre and post-exercise. For other applications, 1 to 5 grams in one single dose or in divided doses with meals are most common.