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.
Every L-Norvaline product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Nutricost Pre-Workout For Women Powder | 89 A | $0.73 |
| 2 | Nutricost Pre-Workout Complex | 89 A | $0.83 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much L-Norvaline should I take?
The typical range is 100-250mg. Acute use
When should I take L-Norvaline?
Pre-workout. Either.
Which form of L-Norvaline is best?
Capsule or powder — In pump products.
Is L-Norvaline safe?
Commonly reported: Generally well tolerated. Serious warnings: Neurotoxicity concerns in high doses (animal). Unknown
Which L-Norvaline supplement scores highest?
Nutricost Pre-Workout For Women Powder, at 89/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
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
Products containing L-Norvaline
Top-scoring supplements in our catalog that list L-Norvaline on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Theoretical benefits, limited research
Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.
Related in Performance
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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.