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Glutamine 850 mg

Vital Nutrients
4.7
★ ★ ★ ★ ★
(28 ratings)
Glutamine 3400 mg
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Score74
The 3.4 g amount is practical for focused use, but the implied four-capsule serving, unclear serving text, and weak value reduce its appeal.
How scoring works
Quantity:100 Capsule(s) • (25 servings)
Goals:
Immunity

Score 74

The 3.4 g amount is practical for focused use, but the implied four-capsule serving, unclear serving text, and weak value reduce its appeal.
How scoring works
$30.99($1.23 per serving)
Pure Formulas
$ 30.99
Vitacost
$ 30.99
iHerb
$ 0.00
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Analysis

A full serving supplies 3.4 g of L-glutamine, a useful middle-range amount for focused use. Package data imply about four capsules per serving, creating a moderate pill burden rather than an excessive one.

The expected L-isomer and total amount are disclosed without a proprietary blend. Conflicting serving-size text reduces label clarity, and no premium purity grade is identified.

Cost efficiency is limited compared with simpler capsule and powder choices. It fits users who want several grams without measuring powder, provided they accept the capsule count and label ambiguity.

Who is it for
  • People who want a multi-gram capsule serving
  • People who avoid powders
Best for
  • Focused capsule-based intake
  • Moderate multi-gram routines

Pros

  • 3.4 g in a full serving
  • Clearly identified L-glutamine
  • Avoids measuring powder

Cons

  • About four capsules per serving
  • Serving-size information appears inconsistent
  • Limited cost efficiency

Nutrient quality

88 Highest impact

The L-isomer is clear, but no premium purity or processing feature is stated; the total serving is substantial, although it requires several capsules. The disclosed glutamine amount is not unnecessarily aggressive; glutamine has a plausible immunity-support role but does not provide broad immune coverage; the single-active formula contains no filler ingredients.

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Ingredient transparency

76 High impact

Every listed active has a specific amount; no proprietary blend hides key doses. The active is specific, while purity details and exact capsule-use directions are not supplied; serving directions and inactive ingredients are not supplied.

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Customer satisfaction

62 Moderate impact

The supplied aggregate average is favorable, though no individual feedback is available; the small rating sample limits confidence, and no individual feedback is supplied. Detailed feedback is absent, so repeated complaints cannot be assessed; real-world fit with the intended purpose remains uncertain.

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Value for money

64 Moderate impact

A useful dose does not fully justify the high price; the serving is expensive and requires several capsules. The single-active formula contains no filler ingredients; powder and lower-cost capsule products offer stronger value.

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Goals

Immunity
Impact
Moderate effect
D- Goal FitB- Strength of SupportD CoverageA Formula Quality

L-glutamine may support intestinal cells and barrier integrity, providing an indirect immune connection. The disclosed L-form and substantial amount make the single-ingredient formula easy to assess.

Evidence for routine immune benefits in healthy adults is limited compared with vitamin C, vitamin D, or zinc. Conflicting serving-size information also creates uncertainty about the practical capsule count.

Study evidence
Glutamine Supportive 36 studies

Ingredients

IngredientAmount per serving
L-Glutamine
3400 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free
Report overview
Glutamine · 3400 mg OverallScore71
B- Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyD- Value

The disclosed glutamine amount fits a useful middle range and uses the expected L-isomer. Package and serving data imply about four capsules per serving, which creates a moderate pill burden despite conflicting serving-size text. Cost efficiency is limited compared with simpler glutamine products.

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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Meta-analysis of Glutamine on Immune Function and Post-Operative Complications of Patients With Colorectal Cancer.
    Yang T; Yan X; Cao Y; Bao T; Li G; Gu S; Xiong K; Xiao T · Frontiers in nutrition · 2021
    Meta-analysis2,201 participants31 studies pooledImmunity forGlutamine
  2. Glutamine granule-supplemented enteral nutrition maintains immunological function in severely burned patients.
    Peng X; Yan H; You Z; Wang P; Wang S · Burns : journal of the International Society for Burn Injuries · 2006
    Randomized trial48 participantsImmunity forGlutamine
  3. Parenteral glutamine supplementation improves serum albumin values in surgical cancer patients.
    Wu JM; Ho TW; Lai IR; Chen CN; Lin MT · Clinical nutrition (Edinburgh, Scotland) · 2021
    Cohort study1,950 participantsImmunity forGlutamine
  4. Glutamine supplementation and immune function during heavy load training.
    Song QH; Xu RM; Zhang QH; Shen GQ; Ma M; Zhao XP; Guo YH; Wang Y · International journal of clinical pharmacology and therapeutics · 2015
    Randomized trial24 participantsImmunity forGlutamine
  5. Efficacy of Glutamine in Treating Severe Acute Pancreatitis: A Systematic Review and Meta-Analysis.
    Dong S; Zhao Z; Li X; Chen Z; Jiang W; Zhou W · Frontiers in nutrition · 2023
    Meta-analysis1,201 participants30 studies pooledImmunity forGlutamine
  6. Decreased mortality and infectious morbidity in adult burn patients given enteral glutamine supplements: a prospective, controlled, randomized clinical trial.
    Garrel D; Patenaude J; Nedelec B; Samson L; Dorais J; Champoux J; D'Elia M; Bernier J · Critical care medicine · 2003
    Randomized trial45 participantsImmunity forGlutamine
  7. Effect of perioperative glutamine-enriched nutritional support on patients with colorectal cancer: A systematic review and meta-analysis.
    Huang Y; Yang XZ; Qin SH; Zhang T; Xie M; Wang JW · World journal of gastrointestinal surgery · 2026
    Meta-analysis1,643 participants27 studies pooledImmunity forGlutamine
  8. Glutamine administration reduces Gram-negative bacteremia in severely burned patients: a prospective, randomized, double-blind trial versus isonitrogenous control.
    Wischmeyer PE; Lynch J; Liedel J; Wolfson R; Riehm J; Gottlieb L; Kahana M · Critical care medicine · 2001
    Randomized trial26 participantsImmunity forGlutamine