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

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

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

In Stock
  • Expiration Date: 05/2018
  • Shipping Weight:
    1.6 lbs
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  • Product Code: THR-51902
  • UPC Code: 693749519027
  • Package Quantity: 18.1 oz
  • Dimensions:
    5.5 x 5 x 5 in, 1.35 lbs
    Switch to Metric units
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Product Overview


  • Dietary Supplement
  • NSF Certified for Sport

To promote healthy mucus membranes of the mouth and gastrointestinal tract

  • Promotes gastrointestinal and immune health
  • The powder form facilitates taking it in higher amounts
  • A necessary nutrient for wound healing
  • Provides support for muscles after exercise or injury
  • Helps maintain cellular hydration and metabolism
  • Supports healthy nerve function
  • Mixes easily in warm or cold liquids

Thorne Research’s L-Glutamine Powder is provided as 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 in lung, liver, brain, and gastrointestinal tissues. Skeletal muscle contains the greatest intracellular concentration of L-glutamine, comprising up to 60 percent of the body’s total L-glutamine stores, and muscle is the primary storage depot and exporter of L-glutamine to other tissues. However, the gastrointestinal tract is the greatest user of L-glutamine in the body because it provides the primary fuel for the nutrient-absorbing cells that line the walls of the small intestine.

Various stress factors – such as trauma, infection, malnutrition, chemotherapy, injury, and high level training – can impact the normal function of the enterocytes of the small intestine by adversely affecting their absorption mechanism. For example, when gut permeability is impaired it can allow large protein molecules to diffuse across the intestine – that would otherwise not – and enter into the bloodstream. The body can identify these large protein molecules as foreign and initiate an immune reaction against them, which can result in the development of food allergies. In numerous animal studies, in which hyperpermeability of the intestine is experimentally induced, the addition of L-glutamine improved permeability function, as well as the gut's immune function.

Under certain circumstances the body's tissues need more L-glutamine than the amount consumed in the diet and internal production. In times of metabolic stress, L-glutamine is released from the muscles into the bloodstream, where it is transported to the tissues in need. But L-glutamine concentration in the skeletal muscles is affected by various insults, including injury, infection, chronic stress, malnutrition, and glucocorticoid use. Research indicates L-glutamine supplementation can offset these conditions.

In addition, as noted above, evidence suggests supplemental L-glutamine benefits gastrointestinal health and supports wound healing, immune health, and nutrient support for individuals undergoing chemotherapy and radiation.

Suggested Use

Take 1 scoop 8 ounces of water 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 %Daily Value
L-Glutamine 5 g *
*Daily Value (DV) not established.
iHerb Customer Reviews

If you have arthritis , give this a BIG MISS

Posted by iHerb Customer on Feb 25, 2017 | Verified Purchase

L-Glutamine was a recommended supplement to improve intestinal health and spike your GH levels (if you are young enough). As the body makes it , this amino is non-essential, but taking even less than half the recommended dose, it donates Nitrogen (urea), a vasodilator and forms L-glutamate (glutamic acid, gluten) , which causes inflammation and increased knee pain for arthritics. This result may be intensified for people with a leaky gut. Max Davies

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Good for the gut

Posted by iHerb Customer on Apr 29, 2016 | Verified Purchase

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 iHerb Customer on Feb 18, 2016 | Verified Purchase

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 iHerb Customer on Apr 21, 2015 | Verified Purchase

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 iHerb Customer on May 19, 2014 | Verified Purchase

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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