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L-Arginine Plus

product on market Capsule Thorne Safety: 94/100
94/100

This product looks safe

  • Folate: 920mg is 920.0× the Tolerable Upper Intake Level (1.0mg)
  • 33% of ingredients have research evidence
C Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

L-arginine and vitamin C are supported by moderate evidence for supporting cardiovascular health and nitric oxide production. Folate contributes to essential metabolic processes, while Greenselect and Bio-Enhanced ingredients have more limited research coverage. The overall profile maintains a high safety score.

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

Alerts

Safety Alerts

Folate: 920mg is 920.0× the Tolerable Upper Intake Level (1.0mg)

Label

Product Label

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

Label Data

3 Capsule(s)
Serving Size
60
Servings
Other Combinations
Product Type
33%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
300 mg (333% DV)
920 mcg DFE (230% DV)
Exceeds UL by 920.0× (UL: 1.0 mg) 226 studies (A:10, B:105)
1 Gram(s)
Market median: 500.0mg (143 products)
Greenselect
200 mg
Bio-Enhanced
50 mg
Market median: 167.0mg (311 products) 183 studies (A:0, B:65)

Other Ingredients

high and low viscosity Hydroxypropyl Methylcellulose Hypromellose Leucine Silicon Dioxide
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested use: Take 3 capsules two times daily or as recommended by your health-care practitioner.

Warnings & Precautions

Tamper evident: Use only if bottle is sealed.

If pregnant, consult your health-care practitioner before using this product.

Formulation Notes

Circulation Heart/vessels

Men's health

Gluten free

L-Arginine Plus with nutrients for added support

This product uses Gnosis S.p.A.'s L-5-Methyltetrahydrofolic Acid, Glucosamine Salt (Quatrefolic). Quatrefolic is a registered trademark of Gnosis S.p.A. L-Arginine complexed with Time-Sorb, a time-release matrix. This product uses Indena S.p.A.'s green tea phytosome (Greenselect). Greenselect is a registered trademark of Indena S.p.A. This product uses GeroNova Research's Bio-Enhanced R-Lipoic Acid. Bio-Enhanced is a registered trademark of GeroNova Research, Inc.

Additional Information

Store tightly sealed in a cool, dry place.

Manufactured in the USA using US & imported ingredients NSF Contents Certified

Metadata

Product Details

UPC / SKU6 93749 52601 8
DSLD Entry Date2025-08-22
Product TypeOther Combinations
FormCapsule
BrandThorne
DSLD ID336346
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.