L-Ornithine Powder Ingredients & Drug Interactions
by NOW Sports
What is this page for?
First and foremost: checking L-Ornithine 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
L-Ornithine Powder is a dietary supplement by NOW Sports with 1 active ingredient. Its ingredients are commonly taken for athletic performance and recovery, reducing fatigue, sleep and stress support.We don’t currently list a known drug interaction for its mapped ingredients — but that doesn’t guarantee none exist, so always confirm with your pharmacist.
HelloPharmacist Scorecard of L-Ornithine Powder by NOW 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.
What’s inside
Full disclosure
This product contains a single active ingredient: L-Ornithine Hydrochloride, a form of the amino acid ornithine. The powder has no inactive ingredients (fillers or binders) listed on file.
Does it work?
Moderate evidence
The evidence for L-Ornithine is limited. It's rated possibly effective for athletic performance, meaning some data suggests a benefit but it's not yet conclusive.
For dry skin, insomnia, and periodontitis (gum inflammation), the evidence is insufficient — we don't have enough reliable data to say whether it works for those purposes.
How safe is it?
Some data gaps
L-Ornithine is generally well tolerated when used short-term, but we don't have much data on long-term safety. The safety data advises against using it during pregnancy and while breastfeeding because there isn't enough information to know whether it's safe for your baby.
If you're pregnant, planning to become pregnant, or breastfeeding, talk with your doctor or pharmacist before taking this product.
Meds to double-check
No known interactions
No interactions are documented in our data for L-Ornithine. Even so, check your medications with the tool on this page or with your pharmacist before starting — absence of documented interactions isn't proof that none exist.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. No medication interactions are currently documented, and some safety-information gaps remain.
This amino acid supplement may support athletic performance, though the evidence isn't strong yet. It's generally well tolerated in the short run, but long-term safety isn't well studied.
Avoid it if you're pregnant or breastfeeding. Chat with your pharmacist before combining it with any medications you take.
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 Aug 22, 2024.
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
General information
Key facts about L-Ornithine Powder, straight from the product label.
| Brand | NOW Sports |
|---|---|
| Barcode (UPC) | 733739002501 |
| Net contents | 8 Ounce(s); 227 Gram(s) |
| Market status | On market |
| Date entered into DSLD | Aug 22, 2024 |
| DSLD ID | 314483 |
| Product type | Amino Acid/protein |
| Supplement form | Powder |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy Free |
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-Ornithine Powder by NOW Sports, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| L-Ornithine Hydrochloride | 1000 mg | -- |
| L-Ornithine | 780 mg | -- |
Tap any ingredient to jump to its full detail below.
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 usage: Take 1/2 teaspoon 1 to 2 times daily, mixed with juice or water, on an empty stomach.
Formula
Ornithine is a non-essential amino acid that plays a central role in the urea cycle, functioning along with arginine and citrulline to rid the body of ammonia, a by-product of protein metabolism. Because ornithine is converted to arginine, it can help to maintain healthy arginine levels in the body. Ornithine can also be converted into other amino acids, such as citrulline, proline, and glutamate, as well as creatine, an important muscular energy source.
Amino acids Fitness amino acid
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
Caution: For adults only. Keep out of reach of children.
Consult physician if pregnant/nursing, taking medication, or have a medical condition.
Do not eat freshness packet enclosed.
Not manufactured with yeast, wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that produces other ingredients containing these allergens.
This product contains hydrochloride, the acid normally present in the stomach, which acts to stabilize the L-ornithine.
Formulation
Natural color variation may occur in this product.
Protein metabolism Urea detox
Steroid tested Non-GMO
Vegan
Packaged and quality tested in the USA.
Not manufactured with yeast, wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. This product is pure, and because no anti-caking agents are used, lumping may occur.
This product is pure, and because no anti-caking agents are used, lumping may occur.
Seals/Symbols
GMP Quality Assured
FDA Statement of Identity
A Dietary Supplement
Storage
This product is sold by weight not volume. Store in a cool, dry, dark place after opening.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
L-Ornithine Powder by NOW Sports label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
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)The Ingredients in L-Ornithine Powder by NOW Sports
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size0.5 Teaspoon(s) Dosage formPowder Servings per container227 Amounts shown are per serving.
L-Ornithine
No knowninteractions
Ornithine is a non-essential amino acid your body makes naturally as part of the urea cycle, which helps remove ammonia. It is sold as a supplement fo...
L-Ornithine monograph & interactionsL-Ornithine Powder by NOW Sports Drug Interactions
We don’t currently list any known drug interactions for the mapped ingredients in L-Ornithine Powder. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.
Brand information
Manufacturer and brand details for L-Ornithine Powder, from the product label.
NOW Sports
See all NOW Sports products- Name
- NOW FOODS
- Street Address
- 395 S. Glen Ellyn Rd.
- City
- Bloomingdale
- State
- IL
- ZipCode
- 60108
- Web Address
- nowsportsproducts.com
L-Ornithine Powder by NOW Sports: Common Questions
Does L-Ornithine Powder by NOW Sports interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What is L-Ornithine used for?
Is L-Ornithine safe to take long-term?
Can I take this while pregnant or breastfeeding?
Does this powder have fillers or other ingredients?
Are there any side effects?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if L-Ornithine Powder is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind L-Ornithine Powder’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
L-Ornithine 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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 1 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.
Ornithine 1 reference
- Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source
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