Fitness L-Glutamine Mood non-GMO Immunity Sport Gluten-free Stress


Can pump up energy and immunity

Item #00345 500 mg 100 Capsules 1 per serving In Stock
Fitness L-Glutamine Mood non-GMO Immunity Sport Gluten-free Stress


Can pump up energy and immunity

Item #00345 500 mg 100 Capsules 1 per serving In Stock

For you, if you are interested in supporting your muscle and immune health

The nutrient in L-Glutamine can:
  • Help maintain healthy muscle mass
  • Support energy levels under heavy stress
  • Promote healthy gut and immune function

Glutamine is the most abundant free amino acid found in the body. Supplements are often associated with serious athletes, but they can be beneficial for anyone who wants to not only maintain muscle health, but also immune and gut health.

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Content: 100 Capsules
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Product details "L-Glutamine"
Health benefits at a glance:

First of all, what is glutamine? It is the most abundant free amino acid within the human muscle and blood. It can be found circulating in the blood, as well as stored in the skeletal muscles and liver, in concentrations ranging from 10- to 100-fold higher than any other amino acid. (1)

Glutamine is a building block for protein and involved in many vital functions. It is required for rapidly dividing cells, including those of the gut, and is a precursor of the brain neurotransmitter glutamate.

Certain factors such as heavy exercising can lower the glutamine levels in the body. Glutamine supplements cause a rapid rise in cellular glutamine levels and glutamine stores in muscle.

Why it works:

Glutamine is utilized in a number of vital functions, including protein synthesis and production of the nucleotide units that make up DNA and RNA

It is an important energy source for cells lining the gut and immune cells and critical for healthy gut and immune function. (1,2) It is also a precursor of the brain neurotransmitter glutamate. (3,4)

Because of its importance in many cellular functions, glutamine is consumed at especially high rates during activities involving intense exercise. (1)  People who engage in heavy exercise can affect their glutamine levels, causing stress to their body and immune systems. (5,6)

Supplementing with glutamine can be important to a serious athlete, someone challenged with muscle loss or someone who wants to help maintain optimal immune function and energy level under heavy stress. (6,7)

Glutamine can also act as a fuel for some tissues as well as for components of the immune system such as lymphocytes and macrophages.

The science behind the product:

The function of glutamine in stimulating glycogen synthase, the enzyme that controls the synthesis and storage of glycogen fuel in muscles and liver, may provide a mechanism by which glutamine supplements promote enhanced fuel stores. (5)

Studies indicate supplementing with glutamine can effectively raise glutamine concentrations in circulation and in muscle tissue, promote a healthy inflammatory response and support antioxidant defenses to maintain muscle health. (8,9)

How to use:

Please take according to the dosage and use guidelines under supplement facts, or as recommended by a healthcare practitioner.

Health topics:
Supplement Facts

Food supplement: 100 capsules

Serving size: 1 vegetarian capsule

Amount per serving:   % RI
L-Glutamine (free form amino acid) 500 mg *

RI = EU Reference Intake, * no RI available.

Other ingredients: vegetable cellulose (capsule), silica, vegetable stearate.


Dosage and use:

Take one (1) capsule once or twice per day on an empty stomach, or as directed by a healthcare practitioner.


Consult your healthcare practitioner before using this product if you have advanced liver disease.




Do not purchase if outer seal is broken or damaged.

If you are undergoing treatment for a medical condition or if you are pregnant or lactating, please consult with your medical practitioner first.

A food supplement should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Store tightly closed in a cool and dry place.

1 Int J Mol Sci. 2017;18(5)
2 Yonsei Med J. 2011;52(6):892-7.
3 Nutrients. 2018;10(11)
4 J Neural Transm (Vienna). 2014;121(8):799-817.
5 Nutrients. 2019;11(4)
6 J Nutr. 2008;138(10):2045s-2049s.
7 J Occup Environ Med. 2019;61(2):e33-e42.
8 Nutrition. 2014;30(5):602-11.
9 Life Sci. 2014;94(2):130-6.

Original source/product from Life Extension®