L-Glutamine Powder — LifeSource VitaminsL-Glutamine Powder — 5,000 mg per serving, 200 Servings — Supports Muscle Recovery & Immune Function*
LifeSource Vitamins L-Glutamine Powder delivers pharmaceutical-grade L-glutamine to support muscle recovery, immune function, and gut health. Each formula is produced in FDA-registered, GMP-certified facilities and supported by NIH-indexed human clinical studies. Our approach focuses on efficacy, safety, and transparency — ensuring every ingredient meets LifeSource’s uncompromising standards for quality and science. Non-GMO, gluten-free, unflavored.*
Research Promise. Every benefit listed is backed by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (PMC) when available. We also reference reviews from 39 leading health organizations and insights from 20 top global universities to keep guidance aligned with credible science.*
Clinically Studied Benefits
Additional / Promising Evidence
University / Academic Context
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Harvard: Reviews L-glutamine’s role in supporting immune function and gut health in human clinical studies, particularly for athletes and recovery. (NIH/PubMed — Anh NH, 2020)
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Johns Hopkins Medicine: Notes L-glutamine’s benefits for intestinal barrier integrity and immune cell support in human trials, especially in critical care settings.
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Oregon State University – Linus Pauling Institute: Summarizes human studies showing L-glutamine supports muscle recovery and nitrogen balance in post-exercise and trauma contexts.
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Mayo Clinic: Highlights L-glutamine’s role in supporting wound healing and gastrointestinal health in human studies, with potential for immune support.
Global Evidence & Authoritative Reviews
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Cochrane: Reviews L-glutamine’s efficacy for supporting gut health and immune function in critically ill patients, based on randomized trials. (NIH/PubMed — Mott C, 2020)
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World Health Organization (WHO): Recognizes L-glutamine as a supplement for supporting recovery in trauma and critical care, with evidence from human studies.
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National Center for Complementary and Integrative Health (NCCIH): Notes L-glutamine’s potential for supporting intestinal health and immune response in human clinical trials.
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Office of Dietary Supplements (ODS): Summarizes human studies indicating L-glutamine supports muscle recovery and immune health in athletes and stressed populations.
We monitor research from leading institutions — Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, the University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, and Ohio State — to keep our guidance aligned with credible science.*
Key Ingredients
L-Glutamine (5,000 mg per serving): Pharmaceutical-grade amino acid that supports muscle recovery, immune function, and gut health.* (NIH/PMC — Legault Z, 2020)
Brief Benefit Bullets
- Supports muscle recovery and immune function*
- Supports growth hormone and brain health*
- Supports gut integrity and healing*
- Supports cellular hydration and protein metabolism*
- Non-GMO, gluten-free, unflavored powder*
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3rd-party lab tested for purity & potency
Suggested Use
Mix 1 scoop (5g) with water or juice, 1–2 times daily, or as directed by a healthcare professional. Do not exceed recommended dose. If pregnant, nursing, taking medications (e.g., chemotherapy drugs), or have a medical condition (e.g., kidney or liver disease), consult your physician.*
Product Specifications
- Serving Size — 1 Scoop (5g)
- Servings Per Container — 200
- Form — Unflavored Powder
- Free From — Non-GMO, gluten-free, no artificial flavors, colors, or preservatives*
- Quality — Third-party tested for identity, potency & purity
LifeSource Vitamins — Proudly American — Since 1992
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before taking any supplements.*
LifeSource Vitamins L-Glutamine Powder 200 Servings supports muscle recovery, immune function, and gut health. Non-GMO, gluten-free, 3rd-party tested. Clinically Studied Ingredients — NIH/PubMed!*
