Arginine orotate

Amino-acidArginine salt

What is it

Arginine orotate is a salt combining the amino acid L-arginine with orotic acid (vitamin B13). It is marketed in some cardiovascular and sports nutrition supplements as an alternative form of arginine.

Evidence for 2 uses

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

Cardiovascular (endothelial function)

Limited Evidence

L-arginine in various forms may modestly improve endothelial function; orotate-specific benefits are not established.

Exercise performance

Limited Evidence

Mixed evidence for L-arginine in athletes; orotate combination has limited specific data.

How it works

L-arginine is a substrate for nitric oxide synthase, producing the vasodilator nitric oxide and supporting endothelial function. Orotic acid is a precursor in pyrimidine nucleotide synthesis and has been studied for cardiac and athletic effects. Combining the two provides both compounds, though distinct benefits over plain L-arginine have not been established in independent clinical trials.

Dosage

Typical doses provide 1 to 3 grams of arginine per serving.

When and how to take it

Often taken before exercise or before meals; no specific evidence-based timing.

1 commercial form

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

L-arginine orotate

Salt form found in cardiovascular and sports supplements.

Provides arginine and orotic acid.

Safety

Generally well tolerated. High-dose arginine can cause GI upset, diarrhea, and rare hypotension. Orotic acid in very high doses has been associated with fatty liver in animals; typical supplement amounts have not shown this in humans.

Who should be cautious

Use cautiously in people with low blood pressure or on antihypertensive drugs. Avoid in pregnancy and breastfeeding at supplement levels. People with herpes simplex may wish to avoid high-dose arginine. People with kidney or liver disease should consult a clinician.

Interactions

Arginine may potentiate blood-pressure-lowering medications. Caution with herpes (arginine may favor viral replication in vitro; clinical relevance is uncertain). Theoretical interaction with nitrates.

Frequently asked questions

Is arginine orotate better than plain L-arginine?⌄

No clear advantage has been established in independent clinical trials.

Can it help with sexual function?⌄

Some small studies on L-arginine suggest modest benefit for erectile dysfunction. The orotate form has not been independently studied for this.

References

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

Research on Arginine orotate (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.