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100% Pure L-Ornithine

product on market Powder NutraBio Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · grounded in 1 source · methodology

L-Ornithine hydrochloride is an amino acid used to support urea cycle function and ammonia detoxification. Research suggests it may assist in reducing fatigue and supporting recovery, though clinical evidence for athletic performance is generally limited. This ingredient is typically well-tolerated with a high safety profile.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for 100% Pure L-Ornithine
Open Full PDF View on NIH DSLD →
Details

Label Data

1.5 Gram(s)
Serving Size
333
Servings
Amino acid/Protein
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Market median: 4002.0mg (1 products) 21 studies (A:0, B:2)

Other Ingredients

Absolutely None
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

1 serving~ mixed with 8-16 oz. favorite beverage~ 2x daily~ best if taken empty stomach Suggested Use: As a dietary supplement, add 1 scoop (1.5 grams) to your favorite beverage 2 times daily on an empty stomach, or as directed by a physician. On training days: Take 1 dose before exercise and 1 at bedtime.

Warnings & Precautions

Warning: Not intended for use by persons under the age of 18. Keep out of the reach of children.

If you are pregnant, breast feeding, have known medical conditions (including kidney or liver disease) or are taking prescription or OTC medication(s) consults with your health care practitioner before using this product.

Formulation Notes

Vegetarian

Allergen Free Non-GMO Gluten Free BSE/TSE Free

No Fillers No Excipients No Additives

Free of Harmful Impurities.

OU

Zero Fillers or Excipients Inferior Ingredients Banned Substances Added Sugars Proprietary Blends Hidden Ingredients

Additional Information

Pharmaceutical Grade Amino Acid

Pharmaceutical Grade. HPLC Lab tested for potency.

Powder 333 servings

Made in GMP & FDA inspected facility

Store in a cool dry place.

Serving scoop included (may settle to the bottom during shipping.)

Without compromise since 1996

23501-006 B20209-001

OU

Manufactured in a GMP & FDA inspected facility

Metadata

Product Details

UPC / SKU6 49908 23501 7
DSLD Entry Date2016-11-21
Product TypeAmino acid/Protein
FormPowder
DSLD ID66451
Data Updated2026-04-11
Research

Research Evidence

849
Research Sources
56
Avg Quality
450
Meta Analysis
152
Rct
137
Systematic Review
73
Clinical Trial
11
Regulatory Source
7
Other
7
Guideline
3
Openfda Safety
2
Cochrane Review
2
Observational
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A Calcium supplementation during pregnancy for preventing hypertensive disorders and related problems
Meta Analysis The Cochrane database of systematic reviews 2025 PubMed DOI
A Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps
Systematic Review The Cochrane database of systematic reviews 2008 PubMed DOI
A Calcium and vitamin D for increasing bone mineral density in premenopausal women
Systematic Review The Cochrane database of systematic reviews 2023 PubMed DOI
A Dietary sodium, sodium-to-potassium ratio, and risk of stroke: A systematic review and nonlinear dose-response meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2019 PubMed DOI
A The association between circulating magnesium and clinically relevant outcomes in patients with chronic kidney disease: A systematic review and meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2021 PubMed DOI
A Calcium channel blockers versus other classes of drugs for hypertension
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.