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L-Arginine

product on market Capsule Twinlab Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • Limited research evidence available for ingredients
B Label Compliance Grade
Label

Product Label

Label for L-Arginine
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
100
Servings
Amino acid/Protein
Product Type
0%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

500 mg
Market median: 500.0mg (143 products)

Other Ingredients

Gelatin Cellulose Medium Chain Triglycerides Magnesium Stearate
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: Take one capsule daily or as directed by a health care professional.

Warnings & Precautions

Warning: If you are pregnant or nursing, taking any medication, or have any medical condition, consult a health care professional before use.

Keep out of reach of children.

Formulation Notes

Bottled and packaged in the USA

L-Arginine is an amino acid and a nitric oxide precursor.

Twinlab L-Arginine capsules are easy to swallow.

No artificial colors, flavors, or preservatives added.

Supports nitric oxide production

Additional Information

Keep tightly closed in a cool, dry place.

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New look, same great formula Best if used by date shown on bottle.

Metadata

Product Details

UPC / SKU0 27434 00111 3
DSLD Entry Date2022-06-16
Product TypeAmino acid/Protein
FormCapsule
BrandTwinlab
DSLD ID268467
Data Updated2026-04-11
Research

Research Evidence

45
Research Sources
52
Avg Quality
12
Rct
11
Systematic Review
11
Meta Analysis
11
Clinical Trial
A Nitric oxide donors (nitrates), L-arginine, or nitric oxide synthase inhibitors for acute stroke
Meta Analysis The Cochrane database of systematic reviews 2017 PubMed DOI
A Arginine supplementation for prevention of necrotising enterocolitis in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2017 PubMed DOI
B Nutritional interventions for treating foot ulcers in people with diabetes
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
B Nitric oxide donors (nitrates), L-arginine, or nitric oxide synthase inhibitors for acute stroke
Systematic Review The Cochrane database of systematic reviews 2002 PubMed
B Arginine supplementation for prevention of necrotising enterocolitis in preterm infants
Systematic Review The Cochrane database of systematic reviews 2007 PubMed
B The Effect of Amino Acids on Wound Healing: A Systematic Review and Meta-Analysis on Arginine and Glutamine
Meta Analysis Nutrients 2021 PubMed DOI
B Nitric oxide donors (nitrates), L-arginine, or nitric oxide synthase inhibitors for acute ischaemic stroke
Systematic Review The Cochrane database of systematic reviews 2000 PubMed
B Dietary Supplements for Erectile Dysfunction: Analysis of Marketed Products, Systematic Review, Meta-Analysis and Rational Use
Meta Analysis Nutrients 2023 PubMed DOI
B Arginine supplementation for prevention of necrotising enterocolitis in preterm infants
Systematic Review The Cochrane database of systematic reviews 2004 PubMed
B An Analysis of Popular Online Erectile Dysfunction Supplements
Systematic Review The journal of sexual medicine 2019 PubMed DOI
View all evidence for L Arginine →
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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.