The Library · Vol. 01Entry No. 97· Chapter 08

L-Arginine

L-Arginine

A semi-essential amino acid that serves as the primary precursor to nitric oxide (NO) in the body. Plays a critical role in vasodilation, blood flow, and cardiovascular health.

1
Active compounds
4
In our products
2
Clinical citations
08
Vitality & Libido
L-Arginine (L-Arginine)

L-ArginineBotanical illustration

§ 1The molecules

Active compounds.

No.01

Nitric Oxide Pathway

Why this matters

  • 01Precursor to nitric oxide for healthy vasodilation*
  • 02Supports blood flow and circulation*
  • 03Promotes cardiovascular function*

*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

§ 2Receipts

What the research shows.

Meta-analysis of 11 RCTs examining L-arginine supplementation for blood pressure. Oral L-arginine (4-24 g/day) significantly reduced systolic BP by 5.39 mmHg (p<0.001) and diastolic BP by 2.66 mmHg (p=0.003) versus placebo, consistent with its role as a nitric oxide precursor supporting endothelial vasodilation.Dong et al., American Heart Journal, 2011
Meta-analysis of 56 studies (mix of RCTs and controlled trials) evaluating L-arginine supplementation for exercise performance. Doses of 1.5-11.2 g taken 60-90 minutes pre-exercise significantly improved time to exhaustion (SMD=0.22, p=0.048) and VO2max, primarily via nitric oxide-mediated improvements in blood flow.Viribay et al., Nutrients, 2020
From the Library · Vol. 01

Know exactly what
you're taking.

Every compound in your stack — sourced, dosed, and cited. No proprietary blends. Browse the science behind the bottles.

125Ingredients
189Compounds
14Chapters
Browse by chapter
A cross-section of the library — six chapters in view, plus eight more inside.Showing 12 · Browse all 125

We publish every dose, every source, every paper we leaned on. An informed customer is our only kind.

Browse the full library

— End of entry

Put L-Arginine to work.

Browse the products it’s in, or build a stack around the goal it serves best.