PURE GLUTAMINE - 500 g – PureNutritionUSA.com
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What is Pure Nutrition L-Glutamine Powder?

Pure Nutrition L-Glutamine Powder provides pure Kyowa Quality fermented L-glutamine. L-Glutamine is a conditionally essential amino acid, meaning the body’s demand for it increases during instances of stress and/or prolonged physical activity. L-glutamine plays a variety of roles in the human body and is particularly important for keeping the immune system and gastrointestinal (GI) tract healthy.

How Pure Nutrition L-Glutamine Powder Works

Amino acids are the building blocks of protein; they are imperative for repairing/building tissue, especially in muscles, bones, hair, skin, and nails. They also play a part in the function of glands, organs, tendons, and blood vessels.

L-Glutamine is the single most abundant amino acid in the human body, found in many tissues. It is a necessary precursor of two key neurotransmitters in the body, Gamma-aminobutyric acid (also referred to simply as GABA) and glutamate. Thus, low availability of L-glutamine in the body can disrupt proper production of these neurotransmitters. However, there are other supplements that increase production of GABA and glutamate more efficiently, such as phenibut and GABA itself.

Furthermore, research suggests that vigorous exercise can deplete L-glutamine levels in the blood significantly for up to six hours after the fact, making it a prudent supplement for athletes and active individuals.1 L-Glutamine is also necessary for proper protein and glycogen synthesis, both of which are imperative for active individuals.

L-Glutamine is also well-known to play a role in the gut, especially for encouraging healthy digestive function and intestinal wall integrity.2Moreover, when L-glutamine levels are depleted by exhaustive exercise (or stress), your immune system is readily suppressed;3 in turn, this leaves the body in a vulnerable state and prone to infection.

Benefits of Pure Nutrition L-Glutamine Powder Supplementation

Given the importance of adequate amounts of L-glutamine in the diet, athletes, active individuals, and bodybuilders may stand to benefit from L-glutamine supplementation. Remember, L-glutamine is a conditionally essential amino acid and deficiency is more likely to occur if you train intensely (and for long periods of time). In such circumstances, L-glutamine supplementation can:

  • Support healthy immune function
  • Promote gastrointestinal integrity and digestion
  • Support proper neurotransmitter production
  • Help maintain protein and glycogen synthesis in the body

L-Glutamine Dosing Recommendations and Uses

Each serving of Pure Nutrition L-Glutamine Powder provides 5 grams of Kyowa Quality fermented L-glutamine, ensuring you get only the purest, most effective form of L-glutamine available. 5 grams of L-glutamine is typically thought of as a baseline dose, with some people taking up to 15g at a time. Based on research, it seems that 5g to 10g of L-glutamine taken during/after training and with meals is more than sufficient.

Realistically, the main benefit of L-Glutamine for athletes and bodybuilders is its role in the GI tract and supporting digestion. Given that active individuals tend to eat more than sedentary individuals, healthy digestion is crucial for maximizing nutrient absorption.

L-glutamine would make for a solid amino acid supplement if you prefer to do fasted cardio as well, since it is readily used for gluconeogenesis in the liver. Essentially, L-glutamine would help spare muscle loss from fasted cardio while not blunting the fat loss process (by inhibiting AMPk).


  1. Keast, D., Arstein, D., Harper, W., Fry, R. W., & Morton, A. R. (1995). Depression of plasma glutamine concentration after exercise stress and its possible influence on the immune system. The Medical journal of Australia, 162(1), 15-18.
  2. Elia, M., & Lunn, P. G. (1997). The use of glutamine in the treatment of gastrointestinal disorders in man. Nutrition, 13(7), 743-747.
  3. Calder, P. C., & Yaqoob, P. (1999). Glutamine and the immune system. Amino acids, 17(3), 227-241.


Supplement Facts
Serving Size 5 g (1 teaspoon )
Servings 100
Amount per Serving
Calories 21 kcal
L-Glutamine 5000 mg

Suggested usage

Take one full teaspoon (5 grams) in about 150-200 ml. water. During periods of intense training and intense stress on the body, take 1 to 3 doses a day. The intake of glutamine before and after exercise or before bedtime is most effective.


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