GLR-6

product on market Capsule IF Intestinal Fortitude Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 33% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

L-glutamine and N-acetyl-D-glucosamine provide moderate evidence for supporting intestinal barrier function. Slippery elm, marshmallow, and licorice are traditionally used for mucosal soothing, though clinical evidence for these specific extracts remains limited. The ingredient profile is generally considered safe for most users.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for GLR-6
Open Full PDF View on NIH DSLD →
Details

Label Data

4 Vegetarian Capsule(s)
Serving Size
30
Servings
Other Combinations
Product Type
33%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

800 mg
Market median: 420.0mg (227 products)
Market median: 1000.0mg (1115 products) 24 studies (A:0, B:9)
Slippery Elm powder
300 mg
Marshmallow extract
300 mg
300 mg
Market median: 420.0mg (127 products) 4 studies (A:0, B:1)
250 mg
Market median: 500.0mg (193 products) 7 studies — no high-quality reviews

Other Ingredients

Hypromellose organic Rice Vitamin C
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested Usage: Take 4 capsules daily.

Formulation Notes

6 of nature's most protective compounds working in concert to repair your mucosal lining, and give your body the building blocks it needs to tighten the gastrointestinal junctions.

This product is manufactured in the USA with ingredients sourced from the U.S. and other markets.

No Gluten Dairy Soy Wheat GMO Tree nuts Peanuts Eggs Fish Colorings Preservatives Animal derivatives

Gut lining repair

Additional Information

Store in a cool dry place with lid closed tightly.

Metadata

Product Details

UPC / SKU7 18598 79224 4
DSLD Entry Date2020-07-23
Product TypeOther Combinations
FormCapsule
DSLD ID229801
Data Updated2026-04-11
Research

Research Evidence

40
Research Sources
54
Avg Quality
16
Rct
12
Meta Analysis
7
Clinical Trial
5
Systematic Review
A Glutamine supplementation for critically ill adults
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
A Arginine supplementation for prevention of necrotising enterocolitis in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2017 PubMed DOI
B Glutamine for induction of remission in Crohn's disease
Systematic Review The Cochrane database of systematic reviews 2016 PubMed DOI
B Human growth hormone and glutamine for patients with short bowel syndrome
Systematic Review The Cochrane database of systematic reviews 2010 PubMed DOI
B Immunonutrition as an adjuvant therapy for burns
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
B Glutamine supplementation to prevent morbidity and mortality in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2008 PubMed DOI
B Glutamine supplementation to prevent morbidity and mortality in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2016 PubMed DOI
B Glutamine supplementation to prevent morbidity and mortality in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2016 PubMed DOI
B Glutamine supplementation for young infants with severe gastrointestinal disease
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
B Glutamine supplementation to prevent morbidity and mortality in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2012 PubMed DOI
View all evidence for Glutamine →
Compare

Similar Products

View all Glutamine products →

This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.