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Dietary supplement

COR-Performance Glutamine Icy Blue Razz Ingredients & Drug Interactions

by Cellucor

COR-Performance Glutamine Icy Blue Razz 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 COR-Performance Glutamine Icy Blue Razz 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

COR-Performance Glutamine Icy Blue Razz is a dietary supplement by Cellucor 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 COR-Performance Glutamine Icy Blue Razz by Cellucor

Ask about any prescription or over-the-counter medication and we check it for interactions with COR-Performance Glutamine Icy Blue Razz by Cellucor — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of COR-Performance Glutamine Icy Blue Razz by Cellucor

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 16, 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 product contains one active ingredient: L-glutamine, an amino acid your body produces naturally. Glutamine plays a role in immune function, gut health, and muscle recovery, and it's been studied in conditions like sickle cell disease, HIV/AIDS-related muscle wasting, recovery after surgery, and critical illness from trauma.

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 protein synthesis after exercise.
  • We looked for evidence on: Exercise-induced muscle damage, Postoperative recovery, Athletic performance, Wound healing, muscle protein synthesis, post-workout recovery — and 1 related terms.
  • The strongest evidence on file: Glutamine is rated "Possibly Effective" for Postoperative recovery (Natural Medicines).
  • Also on file: Glutamine is rated "Possibly Ineffective" for Athletic performance.
  • Also on file: Glutamine is rated "Insufficient Reliable Evidence To Rate" for Wound healing, Exercise-induced muscle damage.

The evidence for glutamine is mixed and depends on what you're using it for. It's rated effective for sickle cell disease, but only possibly effective for HIV/AIDS-related wasting, recovery after surgery, and critical illness from trauma.

For other uses, the evidence isn't established in our data.

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 by healthy adults when taken by mouth. The most common side effects are digestive: belching, bloating, constipation, diarrhea, flatulence, gas pain, nausea, and vomiting — especially at higher doses.

Headache and musculoskeletal pain have also been reported. A small number of people with bipolar disorder taking glutamine supplements have reported mood changes (mania or hypomania), so if you have a history of bipolar disorder, talk with your doctor first.

People with kidney or liver disease should only use glutamine under medical supervision. The safety data for pregnancy and lactation is limited — there isn't enough information to know whether supplemental doses are safe while breastfeeding, so talk with your doctor or pharmacist if you're pregnant or 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.

If you take anticonvulsant medications (seizure drugs), double-check with your doctor or pharmacist before using this product. Glutamine theoretically might reduce how well these drugs work, though this hasn't been reported in patients yet.

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.

COR-Performance Glutamine may be worth considering if you're recovering from surgery, dealing with critical illness, or managing HIV/AIDS-related muscle wasting — though the evidence is strongest for sickle cell disease. If you take seizure medication, or if you have kidney or liver disease, bipolar disorder, or are pregnant or breastfeeding, check with your doctor or pharmacist first before starting.

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 23, 2018.

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 COR-Performance Glutamine Icy Blue Razz, straight from the product label.

Brand Cellucor
Barcode (UPC) 842595101652
Net contents 350 Gram(s); 12.3 Oz(s)
Market status On market
Date entered into DSLD Feb 23, 2018
DSLD ID 82953
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 COR-Performance Glutamine Icy Blue Razz by Cellucor, 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:
7 Gram(s)
Maximum serving Sizes:
7 Gram(s)
Servings per container
50
UPC/BARCODE
842595101652
IngredientAmount% DV
L-Glutamine5 Gram(s)--

Other ingredients: Citric Acid, Natural & Artificial flavors, Malic Acid, Silicon Dioxide, Sucralose, Acesulfame Potassium, FD&C Blue #1

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.
General Statements

Glutamine is the most abundant free amino acid in the body. During prolonged periods of strenuous exercise, glutamine levels may drop, causing stress to the body and leading to muscle breakdown.

This product is sold be weight, not volume. Some settling of powder may occur during shipping and handling, which may affect density of powder. This product contains the servings indicated when measured exactly by weight.

Supports muscle cell recovery Restores glutamine levels Naturally & artificially flavored 50 servings

Made in the U.S.A. using imported ingredient and U.S. and imported components.

Facebook Twitter Instagram Follow @Cellucor for giveaways and updates

Brand IP Statement(s)

COR-Performance Glutamine is a great choice after a workout to help the body replenish glutamine levels which play a role in protein synthesis and muscle cell recovery.

COR-Performance Series

Cellucor, COR-Performance and the logo are trademarks of and distributed by: Nutrabolt

Precautions

Suggested Use: Use only as directed.

Warning: This product is only intended to be consumed by healthy adults, 18 years of age or older.

Do not use this product if you are pregnant or nursing. Before using this product, consult a licensed, qualified, health care professional, including but not limited to, if you are taking any prescription drug or over-the-counter medication, or have any existing medical condition.

Immediately discontinue use and contact a medical doctor if you experience any adverse reaction to this product. Discontinue use 2 weeks prior to surgery. Do not use if safety seal is broken or missing.

Keep out of reach of children.

Suggested/Recommended/Usage/Directions

Suggested Use: Use only as directed. Take one serving (1 scoop) of COR-Performance Glutamine mixed with 8 fl. oz. of cold water or other beverage of choice after training up to two times per day.

Storage

Store in a cool, dry place.

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.

General

104791

FDA Statement of Identity

Dietary Supplement

Seals/Symbols

Manufactured In A GMP Compliant Facility

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

See for yourself

COR-Performance Glutamine Icy Blue Razz by Cellucor label

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

COR-Performance Glutamine Icy Blue Razz 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 COR-Performance Glutamine Icy Blue Razz by Cellucor

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

Serving size7 Gram(s) Dosage formPowder Servings per container50 Amounts shown are per serving.

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

Other (inactive) ingredients: Citric Acid, Natural & Artificial flavors, Malic Acid, Silicon Dioxide, Sucralose, Acesulfame Potassium, FD&C Blue #1. These complete the product’s ingredient list but are not active constituents.

Interaction report

COR-Performance Glutamine Icy Blue Razz by Cellucor Drug Interactions

Want to check YOUR meds against COR-Performance Glutamine Icy Blue Razz?

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 COR-Performance Glutamine Icy Blue Razz interact with 50 drugs. Click any drug to see the details.

1 of the 1 ingredient in COR-Performance Glutamine Icy Blue Razz 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 COR-Performance Glutamine Icy Blue Razz 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 COR-Performance Glutamine Icy Blue Razz, from the product label.

Cellucor

See all Cellucor products
Name
Nutrabolt
Street Address
3891 S. Traditions Dr.
City
Bryan
State
TX
ZipCode
77807
Phone Number
1.866.927.9686
Web Address
www.cellucor.com
Pharmacist Counseling Corner

COR-Performance Glutamine Icy Blue Razz by Cellucor: Common Questions

Does COR-Performance Glutamine Icy Blue Razz by Cellucor interact with any medications?
Yes. Based on its ingredients, COR-Performance Glutamine Icy Blue Razz 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?
COR-Performance Glutamine Icy Blue Razz 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 exactly is L-glutamine, and what does it do in the body?
L-glutamine is an amino acid — one of the building blocks your body uses to make protein. Your body makes its own glutamine naturally, and it plays roles in immune function, gut health, and muscle recovery. This supplement gives you an extra dose of it.
Does this powder have any fillers or other inactive ingredients?
Yes. Beyond the L-glutamine, the powder contains citric acid, malic acid, natural and artificial flavors, sucralose, acesulfame potassium, silicon dioxide, and FD&C Blue #1 for flavor and texture.
What are the most common side effects of glutamine?
Most side effects are digestive — bloating, gas, nausea, diarrhea, constipation, and stomach pain. Headache and muscle pain have also been reported. These tend to happen more at higher doses.
Is this safe to take while I'm pregnant or breastfeeding?
There isn't enough safety data to know either way. Talk with your doctor or pharmacist about whether supplemental glutamine is right for you during pregnancy or while nursing — they can give you personalized advice based on your situation.
Can I take this if I have kidney or liver disease?
The data suggests you should only use glutamine under medical supervision if you have kidney or liver disease. Check with your doctor or pharmacist before starting.
What conditions is this actually proven to help?
Glutamine is rated effective for sickle cell disease. For HIV/AIDS-related muscle wasting, recovery after surgery, and critical illness, the evidence is promising but not yet conclusive — it's rated possibly effective for those uses.

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

Not sure if COR-Performance Glutamine Icy Blue Razz 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.

COR-Performance Glutamine Icy Blue Razz label
Go deeper

The Full Monographs Behind COR-Performance Glutamine Icy Blue Razz’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

COR-Performance Glutamine Icy Blue Razz'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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