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Dietary supplement

L-Glutamine 550 mg Ingredients & Drug Interactions

by Lidtke

Capsule Category: Amino Acid/protein
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

L-Glutamine 550 mg is a dietary supplement by Lidtke 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.

HelloPharmacist Scorecard of L-Glutamine 550 mg by Lidtke

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

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 makes naturally and uses for gut health, immune function, and muscle recovery. You're getting 550 mg per capsule.

The capsule itself is made from vegan plant material, with no other inactive fillers.

Does it work?

Strong 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

This product doesn't appear to be marketed for a specific use, so we graded Glutamine's overall clinical evidence instead.

Strong

Strong clinical evidence supports Glutamine for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Sickle cell disease — rated "Effective" (Natural Medicines).
  • On file: HIV/AIDS-related wasting — rated "Possibly Effective" (Natural Medicines).
  • On file: Critical illness (trauma) — rated "Possibly Effective" (Natural Medicines).
  • On file: Postoperative recovery — rated "Possibly Effective" (Natural Medicines).
  • On file: Pancreatitis — rated "Possibly Effective" (Natural Medicines).

L-Glutamine is rated as effective for sickle cell disease. For other uses—HIV/AIDS-related wasting, recovery after surgery, and critical illness from trauma—the evidence suggests it may help, though more research is needed to be sure.

The data we hold doesn't show effectiveness ratings for other conditions.

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, nausea, vomiting, and abdominal pain.

Headache and musculoskeletal pain have also been reported. If you have kidney or liver disease, use this only under your doctor's supervision.

Rare cases of dizziness, and in people with bipolar disorder, mood changes (mania or hypomania) have been reported at higher doses, but these are uncommon.

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 an anticonvulsant (seizure medication), check with your pharmacist or doctor before adding this product. Glutamine could theoretically reduce how well your seizure drug works, though this hasn't been confirmed in patients yet.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

L-Glutamine may be worth considering if you have sickle cell disease or are recovering from surgery or critical illness, though evidence for the latter two is still building. If you take a seizure medication, check with your doctor or pharmacist before starting—this supplement could theoretically interfere with how your drug works.

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 Nov 19, 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 550 mg, straight from the product label.

Brand Lidtke
Barcode (UPC) 630610003919
Net contents 90 Vegan Capsule(s)
Market status On market
Date entered into DSLD Nov 19, 2021
DSLD ID 257269
Product type Amino Acid/protein
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Vegetarian, Adult (18 - 50 Years), Kosher, Halal
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 550 mg by Lidtke, 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 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
90
UPC/BARCODE
630610003919
IngredientAmount% DV
L-Glutamine550 mg--

Other ingredients: Vegan 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.
General Statements

Thank you for choosing L-Glutamine by Lidtke. We sincerely wish the best of health for you and your family.

Lidtke stands behind each product and guarantees customer satisfaction for 365 days from the date of purchase.

Superb quality since 1994

As certified by the manufacturer.

Formulation

Guaranteed the Finest Quality! We searched the world for the purest natural L-Glutamine available. Exceeds pharmaceutical standards JP, USP, and EP

Non-GMO...no genetically-modified organisms

Made in the U.S.A.

Lidtke's L-Glutamine is a free-form, vegetarian, conditionally-essential amino acid that dissolves easily for quick absorption.

Lidtke's L-Glutamine is a free-form, vegetarian, conditionally-essential amino acid that dissolves easily for quick absorption.

Pharmaceutical grade for stomach, intestine, kidney & muscle health

Purest on the planet

No fillers or flow agents. No added gluten, yeast, wheat, corn, soy, rice, milk, dairy, eggs, tree nuts, peanuts, fish, shellfish, salt, sugar, animal derivatives, artificial color or flavor. Non-GMO.

Formula

Kosher

Halal

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.

Precautions

Warning: Keep out of reach of children.

If you are pregnant, lactating, taking any medications or have a medical condition, consult your doctor.

Discontinue use if adverse reaction occurs. Do not use if seal is damaged or missing.

Toll Free: 1-404-8185 Adverse events may be reported above.

Storage

Keep lid tightly closed. Keep in a cool, dry place.

FDA Statement of Identity

A Dietary Supplement

Suggested/Recommended/Usage/Directions

Directions (Adults): one (1) capsule a few minutes before each meal, or as directed by a health-care professional.

See for yourself

L-Glutamine 550 mg by Lidtke label

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

What’s inside

The Ingredients in L-Glutamine 550 mg by Lidtke

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

Serving size1 Capsule(s) Dosage formCapsule Servings per container90 Amounts shown are per serving.

L-Glutamine

Interacts with
50 drugs
550 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: Vegan Capsules. These complete the product’s ingredient list but are not active constituents.

Interaction report

L-Glutamine 550 mg by Lidtke Drug Interactions

Want to check YOUR meds against L-Glutamine 550 mg?

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

Each ingredient & the kinds of drugs it affects

For each ingredient in L-Glutamine 550 mg 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
The maker

Brand information

Manufacturer and brand details for L-Glutamine 550 mg, from the product label.

Lidtke

See all Lidtke products
Name
Lidtke Technologies
City
Chandler
State
AZ
ZipCode
85226
Phone Number
1-800-404-8185
Web Address
www.lidtke.com
Pharmacist Counseling Corner

L-Glutamine 550 mg by Lidtke: Common Questions

Does L-Glutamine 550 mg by Lidtke interact with any medications?
Yes. Based on its ingredients, L-Glutamine 550 mg 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 550 mg 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 L-Glutamine safe to take while pregnant or breastfeeding?
L-Glutamine is rated as likely safe during pregnancy. While breastfeeding, there isn't enough safety data to know either way. Talk with your doctor or pharmacist about whether to use it during breastfeeding—they can give you personalized advice based on your situation.
What are the most common side effects?
The most common side effects are digestive: belching, bloating, constipation, diarrhea, flatulence, nausea, vomiting, and stomach pain. Headache and muscle pain have also been reported. Most people tolerate it well, especially at moderate doses.
Can I take this if I have kidney or liver disease?
You can, but only under medical supervision. If you have either condition, check with your doctor first before starting this supplement.
Does L-Glutamine actually work for sickle cell disease?
Yes—L-Glutamine is rated as effective for sickle cell disease based on available evidence. For other uses like post-surgery recovery or critical illness, the evidence suggests it may help, though more research is still needed.
What exactly is L-Glutamine and what does it do?
L-Glutamine is an amino acid your body already produces naturally. It supports your gut lining, immune function, and muscle recovery. This supplement gives you an extra 550 mg per dose.

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

Not sure if L-Glutamine 550 mg is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

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 550 mg label
Go deeper

The Full Monographs Behind L-Glutamine 550 mg’s Ingredients

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

Sources

Sources & How We Checked

L-Glutamine 550 mg'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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