Reduce intestinal permeability

What this outcome means

Intestinal permeability describes how tightly your gut lining holds together and how much it lets pass between the digestive tract and bloodstream. On DoseRank it maps to a defined health outcome built from human studies on lactulose-mannitol ratios, zonulin levels, and tight-junction integrity markers – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Digestive sensitivityPeople with ongoing bloating, discomfort, or food reactions.

Gut-barrier curiousThose exploring whether a leaky gut lining affects their symptoms.

Post-illness recoveryAnyone rebuilding gut health after infection, stress, or antibiotics.

Stack buildersAlready taking supplements such as L-Glutamine and want the dose right.

Evidence level

92Strong

L-Glutamine – has strong public evidence. DoseRank looks at both evidence quality and formula fit. A DoseFit Score of 67 means this product's ingredient forms and doses are close to what was used in the studies behind this ranking - DoseRank weights each product ingredient.

Best ingredients

L-Glutamine is the best supported ingredient signal for this outcome.

Dose partly matchedDoseFit 67

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: L-Glutamine 5 g vs 5-15 g.

Processed

915

Available

915

Ingredients

Brands

169

Coverage

100%

How to read the scores

What every metric means

Each score is 0–100. Higher is better for every metric below.

CompositeThe overall DoseRank score — a weighted blend of clinical strength, evidence, dose fit, trust and value.Higher is better

ClinicalHow strongly the formula's ingredients and doses match what clinical studies used for this outcome.Higher is better

EvidenceHow much published human research backs the formula's key ingredients for this outcome — both how many studies exist and how strong they are.Higher is better

ValueHow the price per serving compares with similar products for this outcome — 50 is the typical price, higher means better value for your money.Higher is better

TrustHow well customers rate this product, with extra weight given to ratings backed by a large number of reviews.Higher is better

PopularityHow strongly this product sells compared with the other ranked products for this outcome.Higher is better

This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →

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Questions

Frequently asked

Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.

Reduce intestinal permeability

What this outcome means

Who it's for

Digestive sensitivityPeople with ongoing bloating, discomfort, or food reactions.

Gut-barrier curiousThose exploring whether a leaky gut lining affects their symptoms.

Post-illness recoveryAnyone rebuilding gut health after infection, stress, or antibiotics.

Stack buildersAlready taking supplements such as L-Glutamine and want the dose right.

Evidence level

92Strong

Best ingredients

L-Glutamine is the best supported ingredient signal for this outcome.

Dose partly matchedDoseFit 67

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: L-Glutamine 5 g vs 5-15 g.

Processed

915

Available

915

Ingredients

Brands

169

Coverage

100%

Relevant ingredients

Which ingredient types matter for intestinal permeabilityOpen to see which ingredient types matter for intestinal permeability

814 products across 4 ingredient types — open to filter the ranking.

Use types to filter ranked products

Amino Acids & Derivatives

583 products

The building blocks of protein, taken singly for targeted effects – leucine for muscle, theanine for calm. Free-form versions absorb fast on an empty stomach.

Typical: ,

Minerals & Trace Elements

59 products

Inorganic nutrients from calcium to zinc. The chemical form drives absorption – chelates and citrates usually beat cheap oxides.

Typical:

Fatty Acids & Lipids

47 products

Dietary fats including omega-3s and structural lipids. Look at the active EPA/DHA amounts and freshness, since oils oxidize and turn rancid.

Typical:

Glandulars & Animal-Derived Extracts

125 products

Animal gland and organ-tissue extracts used traditionally for targeted organ support. Purity and grass-fed sourcing are the key quality markers.

Typical:

Top decision cards

Best products for intestinal permeability

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for intestinal permeability

California Gold Nutrition, Sport, L-Glutamine Powder, AjiPure®, Gluten Free, 1 lb (454 g)

California Gold Nutrition$0.26 / serving4.7 · 12,514Available now

Why this ranks here

Evidence fitL-Glutamine is the strongest evidence signal for this outcome.
Dose fitL-Glutamine at 5 g lands inside the studied 5-15 g window.
Price / serving$0.26 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustStrong trust signals — consistently high marks from verified buyer ratings.

Trade-offs

Dose fit is the weak spot on this list

The numbers

5 gIn rangeinside the studied 5-15 g window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products