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L-Arginine and Nitric Oxide: A Practical Guide for Men

By SodaPeak Guide Editorial Team • Updated • 2 min read

Quick answer: L-arginine helps the body make nitric oxide, but supplement benefits for healthy men are unproven and it can interact with some drugs.

L-arginine is an amino acid in meat, dairy and nuts that the body uses to make nitric oxide, a molecule involved in blood vessel relaxation.

What studies suggest

Trials in people with specific conditions show mixed results; see the PubMed L-arginine and nitric oxide research. The NIH ODS advises talking to a professional before supplements.

Safety notes

  • May lower blood pressure
  • Can interact with nitrates and blood pressure drugs
  • May cause digestive upset

In SodaPeak

It is one of nine blend ingredients. If you take heart or blood pressure medicine, read our medication guide first.

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Frequently asked questions

It may in some conditions, but results are inconsistent.

Yes, from protein-rich foods.

Related guides

Sources

*These statements have not been evaluated by the Food and Drug Administration. This content is educational, not medical advice, and may include affiliate links; see our disclaimer.