Pure L-Glutamine Free Form Powder

Suggested Use

DIRECTIONS: For adults; mix one (1) heaping teaspoon (4.5 g) into 4-8 ounces of water or your favorite beverage one to two times daily. Stir or mix in your Precision Engineered(R) shaker and drink one hour before a workout.

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  Doctor's Best Pure L-Glutamine Powder

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Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• 180 Nutrition Hub

  4.9 (60)

  Vitamin & supplements store

  2132 W I-240 Service Road, Oklahoma City, OK 73159

  Directions(405) 768-4257

• Supplement World

  4.8 (246)

  Vitamin & supplements store

  820 SW 89th St, Oklahoma City, OK 73139

  Directions(405) 982-5949

• GNC

  4.0 (63)

  Vitamin & supplements store

  1413 B W I-240 Service Road, Oklahoma City, OK 73159

  Directions(405) 680-8599

• Prime Time Nutrition

  4.3 (57)

  Grocery store

  928 Straka Terrace, Oklahoma City, OK 73139

  Directions(405) 208-4241

• New star nutrition (Herbalife Nutrition Club)

  5.0 (21)

  Vitamin & supplements store

  2716 SW 29th St, Oklahoma City, OK 73119

  Directions(405) 550-7729

• Quality Supplement Manufacturing

  4.1 (18)

  Manufacturer

  300 N MacArthur Blvd, Oklahoma City, OK 73127

  Directions(888) 458-3909

• Sprouts Farmers Market

  4.5 (947)

  Vitamin & supplements store

  12100 S Pennsylvania Ave, Oklahoma City, OK 73170

  Directions(405) 416-7650

• GNC

  4.2 (13)

  Vitamin & supplements store

  3360 N Ave, Building 685, Oklahoma City, OK 73145

  Directions(405) 737-6031

• L-Glutaminase as a therapeutic enzyme of microbial origin

  A Sabu, KM Nampoothiri, A Pandey - Microbial Enzymes and …, 2005 - Springer

  … body are essential for life and health. Microbial enzymes play a … In general a medium containing L-glutamine as the sole … inert materials for SSF facilitates accurate designing of media, …

  200524 citations

• Antibiotic-Free Expression of γ-Glutamyl Transpeptidase in Bacillus subtilis and Process Optimization for L-Theanine Separation and Purification

  R Zhang, B Jiang, Z Xiao, L Xiang - Molecules, 2026 - mdpi.com

  2026

• l-Glutamine-, peptidyl- and protein-glutaminases: structural features and applications in the food industry

  YB Martínez, FV Ferreira, MA Musumeci - World Journal of Microbiology …, 2022 - Springer

  … l-glutamine on human health, a case of hepatotoxicity caused by excessive intake of l-glutamine … deliberate intake of l-glutamine is not recommended and its supplementation should be …

  202221 citations

• Synthesis of amino acid using a flow-type microreactor containing enzyme–mesoporous silica microsphere composites

  S Matsuura, M Chiba, E Tomon, T Tsunoda - RSC advances, 2014 - pubs.rsc.org

  … -immobilised microreactor facilitates the precise control of the … In this study, the engineered glutaminase was prepared as … conversions of L-glutamine to L-theanine by free glutaminase …

  201419 citations

• Study on the targeted regulation of Scutellaria baicalensis leaf on glutamine–glutamate metabolism and glutathione synthesis in the liver of d-gal ageing rats

  C Chen, L Yang, M Li, L Gao, X Qin… - Journal of Pharmacy …, 2023 - academic.oup.com

  … [12] Under oxidative stress, Nrf2 transcription factors are set free from the … and precision and interday accuracy and precision were … the levels of l-glutamine, l-glutamate, GSH and GSSG. …

  20233 citations

• Pharmacological blockade of ASCT2-dependent glutamine transport leads to antitumor efficacy in preclinical models

  ML Schulte, A Fu, P Zhao, J Li, L Geng, ST Smith… - Nature medicine, 2018 - nature.com

  … discovery in the era of precision medicine. However, therapeutic … from a patient at Vanderbilt University Medical Center under a protocol approved by the Vanderbilt University Medical …

  2018543 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-05-24. DSLD Label ID: 21218. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.