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Thorne Research, L-Glutamine Powder, 18.1 oz (513 g)

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In Stock
  • Expiration Date: May 2018
  • Shipping Weight: 1.24 lbs (0.56 kg)
  • Product Code: THR-51902
  • UPC Code: 693749519027
  • Package Quantity: 18.1 oz (513 g)
  • Dimensions: 5 x 5 x 5 in, 1.05 lbs (0.48 kg)
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Product Overview


  • Dietary Supplement

Thorne Research provides L-glutamine in a convenient, cost-effective powder for ease of supplementation in large amounts.

L-glutamine is the most prevalent amino acid in the bloodstream. It is found in high concentration in skeletal muscle and lung, liver, brain, and gastrointestinal tissues. Skeletal muscle contains the greatest intracellular concentration of glutamine, comprising up to 60 percent of total body glutamine stores, and muscle is the primary storage depot and exporter of glutamine to other tissues. However, the gastrointestinal tract is the greatest user of glutamine in the body because glutamine provides the primary fuel for the nutrient-absorbing cells that line the walls of the small intestine.

Various stressors – such as trauma, infection, malnutrition, chemotherapy, and others – can impact the normal function of the enterocytes of the small intestine by adversely affecting how substances are absorbed. For example, when gut permeability is impaired it can allow large protein molecules to diffuse across the intestine – that would otherwise not – and enter the bloodstream. The body can identify these large protein molecules as foreign and mount an immune reaction against them, which can result in the development of food allergies. In numerous animal studies, in which hyper permeability of the intestine is experimentally induced, the addition of glutamine improved permeability function as well as the gut's immune function.

Under certain circumstances the body's tissues need more glutamine than the amount supplied by diet and internal production. In times of metabolic stress, glutamine is released from the muscles into the bloodstream, where it is transported to the tissues in need. But glutamine concentration in the skeletal muscles can be affected by various insults, including injury, infection, prolonged stress, malnutrition, and the use of glucocorticoids. Research demonstrates glutamine supplementation may be of benefit to the needed structures and functions.

In addition, as noted above, evidence suggests supplemental glutamine may provide benefit for gastrointestinal health, as well as support for wound healing, immune health, and nutrient support for individuals undergoing chemotherapy and radiation.

Suggested Use

Take 1 scoop in 8 ounces of water one to three times daily or as recommended by your health-care practitioner.


Tamper Evident: Use only if bottle is sealed.

If pregnant, consult your health-care practitioner before using this product.

Store tightly sealed in a cool, dry place.

Supplement Facts
Serving Size: One Scoop
Servings per container: 90
Each Level Scoop (5.7 g) Contains: Amount Per Serving: % DV
L-Glutamine 5 g *
*Daily Value (DV) not established.
iHerb Customer Reviews

Good for the gut

Posted by 5699130469703720630 on Apr 29, 2016

I have Celiac disease and find that L-glutamine helps with lingering symptoms. This powder is ultra-fine, and dissolves easily in lukewarm water. The taste in water is tolerable and I simply "pretend" it is tea.

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Thorne L-Glutamine Powder

Posted by 5257269958315155891 on Feb 18, 2016

I am very pleased with this product and will definitely be ordering it again from iHerb! It mixes well with room temperature water and the taste is just fine. I ordered this to help repair my leaky gut and I believe it is working. I take one scoop every single morning and I have been feeling much less bloated since I started this! I tried some glutamine pills from a health food store but they had added ingredients I didn't like and it was not cost effective to take so many pills. I like this brand and will continue using it. It seems like a lot of money but it lasts a long time and the quality is very worth it. If you have any stomach troubles I encourage you to try this stuff! Start off slow though, even one scoop was too much for me in the beginning.

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hoping it works

Posted by Reviewer2872454 on Apr 21, 2015

I hope it works. but I can not tell. It is a very good brand...

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Great for helping to heal the gut

Posted by 5454768098461184526 on May 19, 2014

This product is wonderful to use as part of a digestive healing protocol, especially for healing leaky gut. It is a clean formula that is easy to take in water on an empty stomach, or mixed with juice or smoothies.

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Pray for glutamine

Posted by 5441601568455206788 on Dec 15, 2013

Parchased for Leaky Gut & Hypo glycemia. I feel better after start using 20days !

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