Performance
L-Norvaline
Also known as: L-Norvaline
Arginase inhibitor that may extend nitric oxide effects. Enhances pump duration.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Pump extension
- Nitric oxide
How it works
- Inhibits arginase enzyme
- May extend arginine/NO effects
- Theoretical pump enhancement
Dosage
- Typical range
- 100-250mg
- Timing
- Pre-workout
- With food
- Either
- Duration
- Acute use
- Special populations
- Pump seekers
Forms
- Capsule or powder
Safety
Common side effects
- Generally well tolerated
Contraindications
- Unknown
Evidence notes
Theoretical benefits, limited research
Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.