When to take it
Before training, if you choose to use it.
← All supplements
PerformanceNo evidence
L-norvaline
Also known as: norvaline
Norvaline is a non-protein amino acid that inhibits the enzyme arginase in the lab and might therefore prolong arginine's effect. It is sold mainly as part of pre-workout blends.
What it is used for
- Better muscle blood flow (pump) – no reliable human evidence
Forms and how they differ
L-norvaline
alone in capsules or as part of NO boosters; check the dose on the label
Pairs well with
Arginine, citrulline.
Do not combine / separate
Do not combine several NO boosters at once.
Watch out for
Human safety data are limited, and laboratory studies have suggested possible harmful effects on cells. Caution with blood pressure drugs, nitrates and erectile dysfunction drugs. Consult your doctor or pharmacist if you are pregnant, breastfeeding, have kidney or liver disease or take any medicines.
Safety
Do not exceed the label dose.
Practical tip
Given the lack of evidence and unclear safety, the better-researched citrulline is a more sensible choice.
Products containing L-norvaline 1
L-norvaline free form 400 mgfree form · 400 mg / capsule
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence
Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.
Combination check
Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.
Check L-norvaline with othersWhich supplements do you actually need?
Fénix Methode picks them from your blood results and schedules when to take what – no needless purchases.
From the same group
AmylopectinModerate evidenceBeta-alanineStrong evidenceBHB ketonesWeak evidenceCaffeineStrong evidenceCreatineStrong evidenceD-aspartic acidWeak evidence
Important notice
This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.