2.5/5
Weak
evidence
Pump / nitric oxide evidence brief
L-arginine
Some meta-analytic signal exists, but oral arginine is not a top-tier nitric-oxide strategy for gym performance.
Headline Finding
Performance meta-analysis suggests possible effects, but oral arginine is less reliable than better-supported nitrate strategies.
Dose Context
Protocols vary; gastrointestinal tolerance can limit higher intakes.
Important Caveat
Citrulline and nitrate usually deserve review before arginine for performance use cases.
Source Drawer
Linked Research
- Meta-analysis Arginine performance meta-analysis
- Meta-analysis Food-source endurance meta-analysis
- Full text Arginine PDF
- Trial Athlete RCT
- Meta-analysis VO2 max meta-analysis
How To Read This Rating
The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.
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