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Dietary supplement

L-Glutamine Ingredients & Drug Interactions

by Pure

L-Glutamine label
See full label image
Capsule Category: Amino Acid/protein
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking L-Glutamine against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

L-Glutamine is a dietary supplement by Pure with 1 active ingredient. Its ingredients are commonly taken for muscle recovery and sports performance, gut health and 'leaky gut', recovery from severe illness or injury.Based on those ingredients, 50 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are L-Glutamine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against L-Glutamine by Pure

Ask about any prescription or over-the-counter medication and we check it for interactions with L-Glutamine by Pure — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of L-Glutamine by Pure

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Aug 13, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

L-Glutamine Pure is a single-ingredient supplement — one active ingredient, L-glutamine, in a gelatin capsule. L-glutamine is an amino acid your body makes naturally; it's involved in immune function, gut health, and muscle recovery.

The capsule itself is gelatin, an inactive ingredient that holds the powder.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: help the body build muscle mass.
  • We looked for evidence on: Athletic performance, Exercise-induced muscle damage, HIV/AIDS-related wasting, Muscular dystrophy, Postoperative recovery, Wound healing — and 3 related terms.
  • The strongest evidence on file: Glutamine is rated "Possibly Effective" for HIV/AIDS-related wasting (Natural Medicines).
  • Also on file: Glutamine is rated "Possibly Effective" for Postoperative recovery.
  • Also on file: Glutamine is rated "Possibly Ineffective" for Athletic performance, Muscular dystrophy.

The evidence we hold shows L-glutamine is effective for sickle cell disease. It's rated possibly effective for HIV/AIDS-related wasting, postoperative recovery (healing after surgery), and critical illness from trauma.

These ratings reflect what published clinical trials support; your own results may vary, and you should talk with your doctor about whether it's right for your specific situation.

The evidence, ingredient by ingredient Glutamine

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

L-Glutamine is generally well tolerated in healthy adults. The most common side effects from oral doses are digestive — belching, bloating, constipation, diarrhea, flatulence, stomach pain, nausea, and vomiting.

Headache and musculoskeletal pain have also been reported. A couple of people with bipolar disorder reported mood changes (mania or hypomania) when taking high doses, though this is rare.

If you have kidney or liver disease, use this supplement only under medical supervision. There isn't enough safety data to recommend supplement doses during pregnancy — the ingredient itself is rated likely safe, meaning your body already produces it — but talk with your doctor before taking extra.

Similarly, there's not enough data on breastfeeding safety, so check with your clinician before using it while nursing.

Side effects, ingredient by ingredient Glutamine

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Glutamine.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: seizure medications.
  • For scale: 50 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking this product, check with your doctor or pharmacist if you take anticonvulsant medications (drugs to prevent seizures). Glutamine might theoretically interfere with how they work — the interaction is moderate in severity and hasn't been confirmed in people, but it's worth confirming your specific medication isn't a concern.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

L-Glutamine may help with sickle cell disease and possibly with recovery from surgery or critical illness. If you take anticonvulsant medications, check with your doctor or pharmacist first — there's a theoretical concern, even though it hasn't been seen in people.

Anyone with kidney or liver problems should get medical clearance before starting. Talk it over with your doctor or pharmacist to see if it fits your needs.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jul 27, 2021.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about L-Glutamine, straight from the product label.

Brand Pure
Net contents 365 Capsule(s)
Market status On market
Date entered into DSLD Jul 27, 2021
DSLD ID 248695
Product type Amino Acid/protein
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for L-Glutamine by Pure, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
2 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
Servings per container
183
IngredientAmount% DV
L-Glutamine970 mg--

Other ingredients: Gelatin Capsules

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formulation

Pure ingredients. Pure results. Unmatched purity.

Non-GMO ingredients

Gluten-free

Natural source

Amino acid support

Build muscle Immunity boost Rapid recovery

General Statements

Triple the value.

Made with 1 ingredient

Formula

100% Pure L-Glutamine naturally formulated to help the body build muscle mass

Precautions

If you are pregnant, nursing, or taking medication, consult your physician before taking this or any dietary supplement.

For adults only.

Suggested/Recommended/Usage/Directions

Suggested use: Take 2 capsules once daily, or as directed by a physician. Take with at least 8 oz of liquid.

FDA Statement of Identity

Dietary Supplement

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure or prevent any disease or health condition.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

L-Glutamine by Pure label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

L-Glutamine label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in L-Glutamine by Pure

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size2 Capsule(s) Dosage formCapsule Servings per container183 Amounts shown are per serving.

L-Glutamine

Interacts with
50 drugs
970 mg per serving

Glutamine is the most abundant amino acid in the body and is usually made in your muscles. A prescription form is FDA-approved to help reduce sickle c...

L-Glutamine monograph & interactions

Other (inactive) ingredients: Gelatin Capsules. These complete the product’s ingredient list but are not active constituents.

Interaction report

L-Glutamine by Pure Drug Interactions

Want to check YOUR meds against L-Glutamine?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
50Drugs
50 Moderate

Ingredients driving the most interactions

L-Glutamine 50

Individual Drug Interactions

The ingredients in L-Glutamine interact with 50 drugs. Click any drug to see the details.

1 of the 1 ingredient in L-Glutamine interact with drugs. Each result below shows which ingredient is responsible. L-Glutamine

Each ingredient & the kinds of drugs it affects

For each ingredient in L-Glutamine with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

L-Glutamine1 drug type · 50 drugs

Anticonvulsants

Theoretically, glutamine might antagonize the effects of anticonvulsant medications.
Glutamine is metabolized to the excitatory neurotransmitter glutamate. Glutamate might have antagonistic effects with anticonvulsant drugs. However, this interaction has not yet been reported in humans.

Likelihood Possible Evidence D
L-Glutamine full monograph & interactions
The maker

Brand information

Manufacturer and brand details for L-Glutamine, from the product label.

Pure

See all Pure products
Name
Pure Supplements
Street Address
2578 W 600 N
City
Lindon
State
UT
ZipCode
84042
Phone Number
801-903-2280
Web Address
Puresupplementsco.com
Pharmacist Counseling Corner

L-Glutamine by Pure: Common Questions

Does L-Glutamine by Pure interact with any medications?
Yes. Based on its ingredients, L-Glutamine has a known interaction with 50 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
L-Glutamine contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
What is L-glutamine and what does it do?
L-glutamine is an amino acid — a building block of protein — that your body naturally produces. It helps support immune function, gut health, and muscle recovery. This supplement provides a concentrated dose of it.
Can I take this while I'm pregnant or breastfeeding?
The ingredient itself is rated likely safe — your body makes it naturally during pregnancy. But there isn't enough data on whether taking supplement doses is safe, so talk with your doctor before starting. The same goes for breastfeeding — check with your clinician first.
What side effects might I experience?
Stomach and digestive issues are most common: bloating, gas, constipation, diarrhea, nausea, and stomach pain. Headache can happen too. Most people tolerate it well, but if you have kidney or liver disease, use it only under medical supervision.
Does it actually work?
Yes, for sickle cell disease — the evidence is solid. For surgery recovery, trauma recovery, and HIV/AIDS wasting, the evidence suggests it may help, though it's not as strong. Talk with your doctor about whether it fits your situation.
I take a seizure medication — can I use this?
There's a theoretical concern that glutamine might interfere with how anticonvulsants work, though it hasn't been seen in real patients. Check with your doctor or pharmacist before starting, especially since there are 50 anticonvulsants that *could* be affected. Your specific medication might not be a problem, but it's worth confirming.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if L-Glutamine is safe with your meds?

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Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

L-Glutamine label
Go deeper

The Full Monographs Behind L-Glutamine’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Glutamine

Interacts with 50 drugs

Glutamine is the most abundant amino acid in the body and is usually made in your muscles. A prescription form is FDA-approved to help reduce sickle cell disease complications, but for most...

Read the full Glutamine monograph →
Sources

Sources & How We Checked

L-Glutamine's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 11 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Glutamine 11 references
  1. Miller AL. Therapeutic considerations of L-glutamine: a review of the literature. Altern Med Rev 1999;4:239-48..
  2. Bozzetti F, Biganzoli L, Gavazzi C, et al. Glutamine supplementation in cancer patients receiving chemotherapy: a double-blind randomized study. Nutrition 1997;13:748-51.. PubMed
  3. Mebane AH. L-Glutamine and mania. Am J Psychiatry 984;141:1302-3.
  4. Meldrum BS. Glutamate as a neurotransmitter in the brain: review of physiology and pathology. J Nutr 2000;130:1007S-15S.. PubMed
  5. Garlick PJ. Assessment of the safety of glutamine and other amino acids. J Nutr 2001;131:2556S-61S.. PubMed
  6. Chapman AG. Glutamate and epilepsy. J Nutr 2000;130:1043S-5S.. PubMed
  7. Ziegler TR. Glutamine supplementation in cancer patients receiving bone marrow transplantation and high dose chemotherapy. J Nutr 2001;131:2578S-84S.. PubMed
  8. Laviano A, Molfino A, Lacaria MT, Canelli A, De Leo S, Preziosa I, Rossi Fanelli F. Glutamine supplementation favors weight loss in nondieting obese female patients. A pilot study. Eur J Clin Nutr. 2014 Nov;68(11):1264-6. PubMed
  9. Endari (l-glutamine) [package insert]. Torrance, CA: Emmaus Medical,Inc; 2017.
  10. Niihara Y, Miller ST, Kanter J, et al. A Phase 3 Trial of l-Glutamine in Sickle Cell Disease. N Engl J Med 2018;379(3):226-35. doi: 10.1056/NEJMoa1715971.
  11. Ogden HB, Child RB, Fallowfield JL, et al. Gastrointestinal Tolerance of Low, Medium and High Dose Acute Oral l-Glutamine Supplementation in Healthy Adults: A Pilot Study. Nutrients. 2020;12(10):2953. PubMed

See these in context on the Glutamine monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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