Nutricost L-Glutamine Powder Review

Nutricost L-Glutamine Powder provides 5 grams of pure, unflavored L-Glutamine per serving. It is designed to support muscle recovery, gut health, and immune function, and is non-GMO and gluten-free.

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Product Focus: Colon Pouch ComfortAlso covers:Digestion

Tier ⓘ

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Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →

Evidence ⓘ

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How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.

Positive Reviews

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Biohacker Mentions

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Study, Trial or Testing Result SummaryMembersHuman studies

This product gives five grams of L-Glutamine in each serving, which is the only ingredient on the label. For the goal of colon pouch support and comfort, we found human studies on L-Glutamine to report. …

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Review Totals and SummaryMembers16,039 reviews

16,039 reviews · Amazon 13,251 · IHerb 1,128 · Nutricost 527 · Samedaysupplements 4 · Vitacost 1

Nutricost L-Glutamine Powder has attracted a substantial number of users, reflected in thousands of online reviews across platforms like Amazon, iHerb, and the Nutricost website. customers report experiences, frequently noting both the of use and perceived . …

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Biohacker SummaryMembersWhat our biohacker panel says

Eight of the nine panelists who spoke about glutamine, the main ingredient, it or take it, and the common reason is gut support, such as the gut lining and leaky gut. Others take it to sugar cravings, to support immune function when traveling or sick, for a calming during stress, or for recovery after training. …

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RAL SummaryMembersThe tier and why

This product is in the reviews tier because about 90 percent of its than sixteen thousand ratings are . human studies on L-Glutamine for colon pouch support were found.

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More DetailsMembersBody systems · Combine with · Possible side effects

Body systems: Digestive system. Combine with and possible side are for members.

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Supplement FactsL-Glutamine 5 g

Supplement Facts

Serving Size 1 Scoop (5g)

Servings Per Container 60

Amount Per Serving% Daily Value

L-Glutamine

5 g

†

† Daily Value not established.

Other ingredients: None.

Directions: 1 scoop (5g) per day

Label source: iHerb · Report a label change

Where to BuyNutricost · Amazon · iHerb

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Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.