Ultra Gut Care – L-Glutamine – NatureKnit Polyphenol Fiber Matrix — 3000 mg L-Glutamine, Powder, 3.86 oz (15 Servings) — Supports Gut Health & Digestive Comfort*
LifeSource Vitamins Ultra Gut Care combines label-verified L-glutamine and a NatureKnit™ polyphenol fiber matrix with targeted enzymes and
Saccharomyces boulardii to support a healthy gut lining, digestive comfort, and everyday GI resilience. Crafted in FDA-registered, GMP-certified facilities, this great-tasting daily powder reflects our commitment to clean, science-based nutrition guided by human studies indexed in NIH/PubMed under FDA/FTC structure-function standards.*
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 guidance aligned with credible science.*
Clinically Studied Benefits
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Helps maintain intestinal barrier integrity* — L-glutamine supports tight-junction proteins and barrier function. (NIH/PubMed — Wang B, 2015)
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Reduces intestinal permeability in clinical trials* — Meta-analysis shows significant decreases vs. control. (NIH/PubMed — Abbasi F, 2024)
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Improves GI symptoms in IBS-D with leaky gut phenotype* — RCT reported symptom and permeability improvements. (NIH/PubMed — Zhou QQ, 2019)
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Supports enterocyte fuel & mucosal recovery* — Glutamine provides epithelial energy under stress. (NIH/PMC — Rao RK, 2011)
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Polyphenols nourish beneficial microbes & SCFA production* — Reviews indicate favorable microbiota shifts. (NIH/PubMed — Cheng H, 2023)
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Supports digestive balance with S. boulardii* — Randomized trials show shorter duration of acute diarrhea vs. comparators. (NIH/PubMed — Mourey F, 2020)
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Acacia (gum arabic) shows human prebiotic efficacy* — Increased bifidobacteria at ~10 g/day in adults. (NIH/PubMed — Calame W, 2008)
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Larch arabinogalactan supports immune defense & prebiotic effects* — Human evidence indicates functional benefits. (NIH/PMC — Dion C, 2016)
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Polyphenols modulate inflammatory pathways in the gut* — Umbrella review summarizes emerging human data. (NIH/PubMed — Mao T, 2024)
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Overall synergy: glutamine + prebiotic fibers* — Complementary support for barrier function and SCFAs. (NIH/PubMed — Achamrah N, 2017)
Additional / Promising Evidence*
University / Academic Context
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Harvard — Research programs examine diet–microbiome interactions and SCFA-mediated gut health.
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Johns Hopkins — Investigations into epithelial barrier biology and mucosal immunity.
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Oregon State University – Linus Pauling Institute — Work on polyphenols, antioxidants, and GI function.
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University of Florida — Studies on probiotic and prebiotic approaches to digestive wellness.
Global Evidence & Authoritative Reviews
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World Health Organization — Dietary fiber is widely recognized for supporting digestive health and overall wellness.
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American Gastroenterological Association — Evidence reviews address probiotics and dietary strategies for GI comfort.
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NIH — PubMed/PMC host clinical evidence on glutamine, polyphenols, and S. boulardii related to digestive support.
We monitor research from leading institutions — Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, MIT, the University of Florida, Oregon State University – Linus Pauling Institute, Boston University, Cornell, Columbia, and Ohio State — to keep our guidance aligned with credible science.*
Key Ingredients
L-Glutamine — primary fuel for enterocytes; supports barrier integrity and mucosal recovery.* (NIH/PubMed — Wang B, 2015)
NatureKnit™ Polyphenol Fiber Matrix — polyphenol-rich fibers that help cultivate beneficial microbes and SCFAs.* (NIH/PubMed — Cheng H, 2023)
Saccharomyces boulardii — clinically studied probiotic yeast for digestive balance.* (NIH/PubMed — Mourey F, 2020)
Brief Benefit Bullets
- Supports a healthy gut lining & balanced permeability*
- Promotes digestive comfort & everyday GI resilience*
- Polyphenol fiber matrix nourishes beneficial gut microbes*
- Includes S. boulardii for digestive balance*
- Plant-based enzymes support macronutrient breakdown*
- Non-GMO, gluten-free; mixes easily into water or smoothies*
- Vegan-friendly formula; gentle for everyday use*
- Great tasting; convenient once-daily scoop*
Suggested Use
See product label for full instructions, or as directed by your healthcare professional. Do not exceed recommended dose. If pregnant, nursing, taking medications, or have a medical condition, consult your physician.*
Product Specifications
- Serving Size — 1 Scoop (3.86 g)
- Servings Per Container — 15
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Form — Powder
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Key actives per serving — L-Glutamine 3000 mg; NatureKnit™ Polyphenol Fiber Matrix 2000 mg; Gluten Enzyme Formula 850 mg; Saccharomyces boulardii 5 Billion CFU†
- Free From — Non-GMO, gluten-free; no artificial colors, preservatives or synthetic chemicals*
- Quality — Manufactured in FDA-registered, GMP-certified facilities
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.
Ultra Gut Care — 3000 mg L-Glutamine powder (3.86 oz, 15 servings). Supports gut lining, digestive comfort & microbiome balance; non-GMO. Clinically Studied Ingredients — NIH/PubMed!*
