L-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*. This conditionally essential amino acid serves as primary fuel for immune cells and intestinal enterocytes, helps maintain gastrointestinal lining integrity*, and aids post-exercise muscle repair*. 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-Driven & Verified Product.
Explore the clinical research, ingredient science, and global evidence supporting this product below.
Research Promise: At LifeSource Vitamins, our commitment is rooted in research and results. Every benefit below is supported by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (NLM) PubMed Central (PMC) when available. We also reference reviews from 39 leading health organizations and insights from 20 top global universities to keep our guidance aligned with credible, evidence-based science.* Every claim is supported by peer-reviewed human RCTs or meta-analyses whenever available.
Clinically Studied Benefits
✓ Supports muscle recovery* — Reduces muscle breakdown and accelerates recovery post-exercise.*
NIH/PubMed — Legault Z, 2015
✓ Supports immune function* — Serves as primary fuel for immune cells.*
NIH/PMC — Cruzat V, 2021
✓ Supports gut health* — Maintains gastrointestinal lining and reduces permeability.*
NIH/PubMed — Benjamin J, 2015
✓ Supports muscle recovery post-exercise* — Lowers muscle breakdown markers.*
NIH/PubMed — Legault Z, 2015
✓ Supports growth hormone levels* — Increases growth hormone production with supplementation.*
NIH/PubMed — Welbourne T, 1995
✓ Supports wound healing* — Enhances healing rates in trauma patients.*
NIH/PubMed — Wischmeyer PE, 2000
✓ Supports brain function* — Converts to glutamic acid for neurotransmitter production.*
NIH/PubMed — Bowery NG, 2006
Additional / Promising Evidence
✓ May support gut health* — May stabilize blood sugar and support intestinal function.*
NIH/PubMed — Santos HO, 2022
✓ May support mucosal health* — Potential benefits for intestinal mucosa.*
NIH/PubMed — Benjamin J, 2021
✓ May support mood balance* — Supports GABA production for emotional health.*
NIH/PubMed — Hinz M, 2012
University-Led & Academic Studies
✓ 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
✓ Johns Hopkins Medicine: Notes L-glutamine’s benefits for intestinal barrier integrity and immune cell support in human trials, especially in critical care settings.*
✓ Oregon State University – Linus Pauling Institute: Summarizes human studies showing L-glutamine supports muscle recovery and nitrogen balance in post-exercise and trauma contexts.*
✓ Mayo Clinic: Highlights L-glutamine’s role in supporting wound healing and gastrointestinal health in human studies, with potential for immune support.*
Global Evidence & Reviews
✓ 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
We monitor research from leading institutions —
Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, Ohio State — to align 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.*
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.
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!*
