Interactions on record — worth a quick check against your medications. Based on 2 of 4 ingredients. Check your meds →
Dietary supplement

Glutamine-SR Unflavored Ingredients & Drug Interactions

by MHP Maximum Human Performance

Glutamine-SR Unflavored label
See full label image
Powder Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Glutamine-SR Unflavored 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-SR Unflavored is a dietary supplement by MHP Maximum Human Performance with 4 active ingredients. 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 Glutamine-SR Unflavored by MHP Maximum Human Performance

Ask about any prescription or over-the-counter medication and we check it for interactions with Glutamine-SR Unflavored by MHP Maximum Human Performance — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Glutamine-SR Unflavored by MHP Maximum Human Performance

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 Jul 30, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 1 of its 4 active ingredients.
  • “Patented Sustained Release Micro-Feed Technology” is listed as a grouped ingredient — the label gives one combined amount (1 Gram(s)) without saying how much of each component you get.

This powder contains 4 ingredients total, including two active ones: L-glutamine and soy lecithin. L-glutamine is an amino acid your body uses for muscle recovery and immune function.

Soy lecithin is a phospholipid (a fatty substance) from soybeans. The other two ingredients — a sustained-release delivery system and a glucose polymer matrix — help the powder dissolve and release gradually in your body.

There are no listed inactive fillers or binders beyond what's described.

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 growth, strength, recovery and energy.
  • We looked for evidence on: Athletic performance, Exercise-induced muscle damage, Postoperative recovery, Wound healing, Critical illness (trauma), Burns — and 3 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, Burns.

L-glutamine is rated effective for sickle cell disease, and possibly effective for HIV/AIDS-related wasting, postoperative recovery, and critical illness from trauma. Soy lecithin's effectiveness isn't well established — it's rated likely ineffective for Alzheimer disease, and there's insufficient evidence to say whether it helps with cognitive decline, liver health during IV nutrition, anxiety, or bipolar disorder.

The product's overall effectiveness depends on what you're taking it for; if it's for sickle cell or post-surgical recovery, the glutamine data supports its use, but talk with your doctor about whether it's right for your situation.

The evidence, ingredient by ingredient Glutamine Lecithin

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 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • 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, though it can cause gastrointestinal upset — belching, bloating, constipation, diarrhea, flatulence, nausea, vomiting, and stomach pain have been reported, especially at high doses (10–30 grams daily). Headache and dizziness can occur, and a small number of people with bipolar disorder taking up to 4 grams daily have experienced mania or hypomania.

If you have kidney or liver disease, you should only use glutamine under medical supervision. Soy lecithin is generally well tolerated but can cause abdominal pain, diarrhea, bloating, and nausea, and may trigger allergic skin reactions in people with egg or soy allergies.

Both L-glutamine and soy lecithin are rated likely safe in pregnancy and lactation, though you should confirm this with your healthcare provider for your specific situation.

Side effects, ingredient by ingredient Glutamine Lecithin

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 2 matched ingredients 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.

Double-check this product with your doctor or pharmacist if you take anticonvulsant medications (seizure drugs). L-glutamine is metabolized to glutamate, which might theoretically antagonize how these medications work — this hasn't been confirmed in humans, but it's important to rule out before you start.

No other medication interactions are documented in our data for the ingredients we could check.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Glutamine-SR works best for people recovering from surgery, dealing with sickle cell disease, or managing HIV/AIDS-related muscle loss — the evidence for glutamine is strongest in those areas. If you take seizure medications, talk with your doctor or pharmacist before starting, because glutamine might theoretically interfere with how those drugs work.

Gastrointestinal side effects are common, especially at higher doses, and people with bipolar disorder or liver or kidney disease should use it only under medical supervision. Check your exact medications with your doctor or pharmacist before you begin.

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

Assessment coverage: 2 of 4 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated May 23, 2014.

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-SR Unflavored, straight from the product label.

Brand MHP Maximum Human Performance
Barcode (UPC) 666222074108
Net contents 1000 Gram(s); 2.2 lbs
Market status On market
Date entered into DSLD May 23, 2014
DSLD ID 33145
Product type Other Combinations
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-SR Unflavored by MHP Maximum Human Performance, 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:
6 Gram(s)
Maximum serving Sizes:
6 Gram(s)
Servings per container
167
UPC/BARCODE
666222074108
IngredientAmount% DV
Calories25 {Calories}--
L-Glutamine5 Gram(s)--
Soy Lecithin0 NP--
Patented Sustained Release Micro-Feed Technology1 Gram(s)--
Low DI Glucose Polymer Matrix0 NP--
MicroTex hydrogenated Vegetable Oil0 NP--

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.
Brand IP Statement(s)

Sustained Release Micro-Feed Technology(TM)

General Statements

12 HOUR MUSCLE FEEDER

Exclusive Sustained Release Micro-Feed Technology: Glutamine-SR’s Micro-Feed Technology allows for an unprecedented 100% of L-Glutamine utilization, maximizes anabolic/anti-catabolic effects and optimizes muscle growth and recovery. Research on leading brand supplemental L-Glutamine powder has shown that the stomach utilizes 70% of the amount ingested, leaving only 30% available for delivery to muscle tissue. The exclusive and patented Micro-Feed Technology used in Glutamine-SR protects the L-Glutamine as it is transported through the stomach and increases the amount delivered to muscle tissue. The Micro-Feed Technology also increases bio-availability and utilization of L-Glutamine by providing a controlled, steady supply for 12 straight hours. Glutamine-SR’s 12 Hour Sustained Release Micro-Feed Technology has raised the standards in glutamine supplementation, making Glutamine-SR the most bio-efficient and powerful glutamine supplement in the world.*

{chart} When Other Glutamine Products Stop Working, Glutamine-SR Continues to Feed Muscle Tissue For 12 Straight Hours! The Patented Micro-Feed Sustained Release Technology provides an Immediate and continual supply of Glutamine for 12 hours. Regular Glutamine delivers only 30% of the amount consumed and supplies muscle tissue for only 2 hours.

Fast & Continual Release Profile For Increased Muscle Growth, Strength, Cell Volumization, Protein Synthesis, Recovery & Energy*

NOTICE: Use this product as a food supplement only. Do not use for weight reduction.

FDA Statement of Identity

Dietary Supplement

Precautions

*Keep out of reach of children.

*Do not purchase if seal is broken.

NOTICE: Use this product as a food supplement only. Do not use for weight reduction.

Suggested/Recommended/Usage/Directions

Directions: Mix one scoop with 8-10 oz of water or your favorite beverage 1 to 2 times daily. Glutamine-SR can also be added to your protein or meal replacement supplement.

FDA Disclaimer Statement

*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.

General

A3391001

Formula

Anabolic/Anti-Catabolic Bio-Efficient Glutamine

Storage

*Protect from heat, light and moisture. *Store at 15-30(0)C (59-86(0)F).

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

See for yourself

Glutamine-SR Unflavored by MHP Maximum Human Performance label

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

Glutamine-SR Unflavored 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-SR Unflavored by MHP Maximum Human Performance

These are the 4 active ingredients this product is made of. Select any to open its full monograph.

Serving size6 Gram(s) Dosage formPowder Servings per container167 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

L-Glutamine

Interacts with
50 drugs
5 Gram(s) 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

Patented Sustained Release Micro-Feed Technology

1 Gram(s) per serving
  • › Soy Lecithin
  • › Low DI Glucose Polymer Matrix
  • › MicroTex hydrogenated Vegetable Oil
Interaction report

Glutamine-SR Unflavored by MHP Maximum Human Performance Drug Interactions

Want to check YOUR meds against Glutamine-SR Unflavored?

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 Glutamine-SR Unflavored interact with 50 drugs. Click any drug to see the details.

1 of the 4 ingredients in Glutamine-SR Unflavored 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 Glutamine-SR Unflavored 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 Glutamine-SR Unflavored, from the product label.

MHP Maximum Human Performance

See all MHP Maximum Human Performance products
Name
Maximum Human Performance, Inc.
Street Address
21 Dwight Place
City
Fairfield
State
NJ
ZipCode
07004
Phone Number
1.888.783.8844
Web Address
www.getMHP.com
Pharmacist Counseling Corner

Glutamine-SR Unflavored by MHP Maximum Human Performance: Common Questions

Does Glutamine-SR Unflavored by MHP Maximum Human Performance interact with any medications?
Yes. Based on its ingredients, Glutamine-SR Unflavored 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-SR Unflavored contains 4 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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 this safe if I'm pregnant or breastfeeding?
Both L-glutamine and soy lecithin, the active ingredients, are rated likely safe during pregnancy and lactation. That said, the facts don't give enough detail to answer for your personal situation — talk with your doctor or pharmacist to confirm it's appropriate for you.
What are the most common side effects?
Belching, bloating, constipation, diarrhea, flatulence, nausea, vomiting, and stomach pain are the most common, especially at higher doses. Headache and dizziness have also been reported. Most people tolerate glutamine well, but if you have a sensitive stomach, start with a low dose and increase gradually.
Does this product contain soy, and could it trigger an allergy?
Yes — soy lecithin is one of the active ingredients. If you have a soy or egg allergy, soy lecithin can cause allergic skin reactions, so you should avoid this product and talk with your doctor about alternatives.
Will this help my muscle recovery after surgery?
L-glutamine is rated possibly effective for postoperative recovery, which is a reasonable use for this product. That said, it's one piece of recovery — follow your doctor's full recovery plan, and ask your healthcare provider whether adding a glutamine supplement makes sense for your situation.
Can I take this if I have liver or kidney disease?
The facts say you should only use glutamine under medical supervision if you have kidney or liver disease. Check with your doctor before you start, because your liver and kidneys process this ingredient, and your healthcare provider needs to know if you're taking it.
How much glutamine is in each serving?
The product facts don't list the per-serving amount of L-glutamine or the other ingredients. Check the label or contact the manufacturer directly to find out the dose.

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

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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-SR Unflavored label
Go deeper

The Full Monographs Behind Glutamine-SR Unflavored’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 → Herb & supplement monograph

Lecithin

Lecithin is a natural fatty substance found in foods and made by the body that is widely used as a supplement and food emulsifier. Evidence supporting most of its health claims is limited, t...

Read the full Lecithin monograph →
Sources

Sources & How We Checked

Glutamine-SR Unflavored'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 20 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 →

Lecithin 9 references
  1. Buchman AL, Dubin M, Jenden D, et al. Lecithin increases plasma free choline and decreases hepatic steatosis in long-term total parenteral nutrition patients. Gastroenterology 1992;102:1363-70.
  2. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (2000). Washington, DC: National Academy Press, 2000. Available at: http://b
  3. Chatellier G, Lacomblez L. Tacrine (tetrahydroaminoacridine; THA) and lecithin in senile dementia of the Alzheimer type: a multicentre trial. Groupe Francais d'Etude de la Tetrahydroaminoacridine. BMJ 1990;300:495-9.
  4. Gelenberg AJ, Dorer DJ, Wojcik JD, et al. A crossover study of lecithin treatment of tardive dyskinesia. J Clin Psychiatry 1990;51:149-53.
  5. Little A, Levy R, Chuaqui-Kidd P, Hand D. A double-blind, placebo controlled trial of high-dose lecithin in Alzheimer's disease. J Neurol Neurosurg Psychiatry 1985;48:736-42. PubMed
  6. Palm M, Moneret-Vautrin DA, Kanny G, et al. Food allergy to egg and soy lecithins. Allergy 1999;54:1116-7. PubMed
  7. Drachman DA, Glosser G, Fleming P, et al. Memory decline in the aged: treatment with lecithin and physostigmine. Neurology 1982;32:944-50. PubMed
  8. Gelenberg, A. J., Doller-Wojcik, J. C., and Growdon, J. H. Choline and lecithin in the treatment of tardive dyskinesia: preliminary results from a pilot study. Am J Psychiatry 1979;136(6):772-776. PubMed
  9. Electronic Code of Federal Regulations. Title 21, Chapter 1, Subchapter B, Part 184: Direct food substances affirmed as Generally Recognized as Safe. Subpart B - listing of specific substances affirmed as GRAS. Sec. 184.1400 Lecithin. Available at: https:

See these in context on the Lecithin 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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