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Dietary supplement

Glutamine Powder Ingredients & Drug Interactions

by EFX Sports

Glutamine Powder label
See full label image
Powder Category: Amino Acid/protein
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Glutamine Powder 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

Glutamine Powder is a dietary supplement by EFX Sports 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 GlutaZorb. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Glutamine Powder by EFX Sports

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

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HelloPharmacist Scorecard of Glutamine Powder by EFX Sports

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 6, 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.

This powder contains a single active ingredient: glutamine (supplied as GlutaZorb). Glutamine is an amino acid — a building block your body uses to make proteins and support immune and digestive function, especially during stress or recovery from illness or injury.

There are no other inactive ingredients listed.

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: muscle recovery and athletic performance support.
  • We looked for evidence on: Athletic performance, Exercise-induced muscle damage, Postoperative recovery, Wound healing, Critical illness (trauma), Sports endurance — and 2 related terms.
  • The strongest evidence on file: Glutamine is rated "Possibly Effective" for Critical illness (trauma) (Natural Medicines).
  • Also on file: Glutamine is rated "Possibly Effective" for Postoperative recovery.
  • Also on file: Glutamine is rated "Possibly Ineffective" for Athletic performance.

The evidence shows glutamine is effective for sickle cell disease. It's possibly effective for HIV/AIDS-related wasting, recovery after surgery, and critical illness from trauma.

The facts we hold don't establish effectiveness for other uses.

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.

Glutamine is generally well tolerated when taken by mouth in healthy adults. The most common side effects are digestive: belching, bloating, constipation, diarrhea, flatulence, and gastrointestinal pain, along with headache, nausea, vomiting, cough, and musculoskeletal pain.

Dizziness and headache have been reported, and in rare cases, two people with bipolar disorder experienced mania or hypomania while taking glutamine — though it's unclear if the supplement caused this. If you have kidney or liver disease, you should only use glutamine under medical supervision.

There isn't enough safety data to recommend it during pregnancy or breastfeeding unless your doctor advises it specifically.

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.

If you take anticonvulsant medications (drugs to prevent seizures), check your exact medication with the tool on this page before starting glutamine, and confirm with your doctor or pharmacist first — glutamine might theoretically reduce how well they work.

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.

This supplement is established as effective for sickle cell disease and shows promise for recovery after surgery or critical illness. If you take an anticonvulsant medication, check with your doctor or pharmacist before starting it.

Most people tolerate it well, but digestive side effects are common at higher doses. Talk it over with your own healthcare provider to see if it's right for your situation.

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 Feb 24, 2017.

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 Glutamine Powder, straight from the product label.

Brand EFX Sports
Barcode (UPC) 737190002520
Net contents 3.53 oz.; 0.22 lb; 100 Gram(s)
Market status On market
Date entered into DSLD Feb 24, 2017
DSLD ID 71274
Product type Amino Acid/protein
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
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 Glutamine Powder by EFX Sports, 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:
1.5 Gram(s)
Maximum serving Sizes:
1.5 Gram(s)
Servings per container
66
UPC/BARCODE
737190002520
IngredientAmount% DV
GlutaZorb1500 mg--

Other ingredients: None

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.
Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take 2 scoops (1.5 g) in the morning and 2 scoops (1.5 g) in the evening mixed with water or your favorite beverage.

General Statements

Benefits of Glutamine Glutamine is a powerful amino acid that your body demands during intense exercise and metabolic stress (which includes injury, illness, dieting, etc). Depletion of Glutamine stores can decrease strength, stamina, and recovery. Many hard training athletes supplement their diet with glutamine to aid performance and recovery.

Our scientist, Dr. Golini, discovered that buffering glutamine molecules creates a more stable form of Glutamine.

Recovery

Training ground

Ultra concentrated

EU Plant# 1000135313

Made in USA. In God we trust.

Formula

The GLutaZorb difference! Patent-pending GlutaZorb is an ultra-pure, pH-Correct Glutamine made using an enzymatically modified buffered fermentation process.

GlutaZorb

Stable Glutamine

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

FDA Statement of Identity

Dietary Supplement

Brand IP Statement(s)

GlutaZorb Super absorbent Glutamine GlutaZorb is a registered trademark of All American Pharmaceutical. GlutaZorb is patent pending.

Proudly manufactured by All American Pharmaceutical

2016 EFX Sports

Storage

Storage: Keep lid tightly closed in a cool, dry place away from children.

Precautions

Storage: Keep lid tightly closed in a cool, dry place away from children.

General

AAP291-100

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

See for yourself

Glutamine Powder by EFX Sports label

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

Glutamine Powder 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 Glutamine Powder by EFX Sports

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

Serving size1.5 Gram(s) Dosage formPowder Servings per container66 Amounts shown are per serving.

GlutaZorb

Interacts with
50 drugs
1500 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...

GlutaZorb monograph & interactions

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

Glutamine Powder by EFX Sports Drug Interactions

Want to check YOUR meds against Glutamine Powder?

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

GlutaZorb 50

Individual Drug Interactions

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

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

Each ingredient & the kinds of drugs it affects

For each ingredient in Glutamine Powder 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.

GlutaZorb1 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
GlutaZorb full monograph & interactions
The maker

Brand information

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

EFX Sports

See all EFX Sports products
Name
EFX Sports
City
San Jose
State
CA
ZipCode
95124
Phone Number
(888) 238-1864
Web Address
EFXSPORTS.com
Pharmacist Counseling Corner

Glutamine Powder by EFX Sports: Common Questions

Does Glutamine Powder by EFX Sports interact with any medications?
Yes. Based on its ingredients, Glutamine Powder 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?
Glutamine Powder 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.
Is glutamine safe during pregnancy or breastfeeding?
The safety data is limited. There isn't enough information to know if it's safe during pregnancy or breastfeeding unless your doctor recommends it. Talk with your doctor or pharmacist for personalized advice.
What are the most common side effects?
Digestive issues are the most common — belching, bloating, constipation, diarrhea, flatulence, and stomach pain. Headache, nausea, and vomiting have also been reported. Most of these are mild and dose-related; in one case, reducing the dose resolved symptoms.
Does glutamine actually work?
It's established as effective for sickle cell disease. For recovery after surgery, recovery from critical illness or trauma, and HIV/AIDS-related wasting, the evidence suggests it may help but isn't definitive yet.
Who should be careful taking this?
If you have kidney or liver disease, use it only under medical supervision. If you take anticonvulsant medications, check with your doctor or pharmacist first. If you have bipolar disorder, talk with your doctor — a couple of cases of mania have been reported, though a connection isn't proven.
What is glutamine and why take it?
Glutamine is an amino acid your body uses to build proteins and support immunity, especially during stress, illness, or recovery from injury or surgery. This supplement is used to help support recovery and manage certain conditions like sickle cell disease.

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

Not sure if Glutamine Powder is safe with your meds?

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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.

Glutamine Powder label
Go deeper

The Full Monographs Behind Glutamine Powder’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

Glutamine Powder'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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