Arginine malate

Amino-acidArginine salt

What is it

Arginine malate (di-arginine malate, sometimes called nitrous malate) is a salt of the amino acid L-arginine combined with malic acid. It is used in pre-workout supplements for nitric oxide and energy support.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Exercise performance and pump

Limited Evidence

Arginine-based pre-workouts have inconsistent evidence for performance. Citrulline malate has stronger evidence at adequate doses.

How it works

L-arginine is a precursor to nitric oxide via nitric oxide synthase, supporting vasodilation. Malic acid is a Krebs cycle intermediate that contributes to ATP generation. The combination is marketed as supporting both vascular and energy metabolism for exercise. In practice, oral L-arginine has limited NO-boosting effect at standard doses because most is metabolized in the gut and liver. Citrulline or citrulline malate are usually more effective for sustained plasma arginine elevation and downstream NO.

Dosage

Pre-workout doses of arginine malate typically deliver 3 to 5 g of arginine. Citrulline malate doses for performance benefits are generally 6 to 8 g.

When and how to take it

Take 30 to 60 minutes before exercise.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Di-arginine malate salt

Found in pre-workout blends; citrulline malate is typically preferred for performance.

Variable due to first-pass metabolism.

Safety

L-arginine is generally well tolerated. High doses can cause GI upset and diarrhea. Long-term safety at high pre-workout doses is not well characterized.

Who should be cautious

Avoid after recent myocardial infarction (where high-dose arginine was associated with worse outcomes in a clinical trial). Use caution if on blood pressure medication.

Interactions

May potentiate antihypertensive medications and PDE-5 inhibitors. Theoretical interactions with anticoagulants.

Frequently asked questions

Is arginine malate better than citrulline malate?⌄

No. Citrulline has better systemic arginine-raising kinetics and stronger performance evidence.

Should I take arginine on rest days?⌄

There is no clear benefit to daily use for healthy adults outside specific clinical contexts.

References

Arginine malate on Wikidata — Wikidata link

Arginine malate on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Arginine malate (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.