High Blood Pressure and Arginine Supplements: What to Know Before You Try
What studies show
A 2011 meta-analysis found that oral arginine lowered blood pressure slightly, and a 2019 review compared arginine and citrulline effects on blood pressure. Effects were modest and varied by population and dose.
Why this matters if you take medicine
If your medicine already lowers pressure, an additional gentle effect from a supplement may cause dizziness or low readings. The NHLBI describes target ranges and treatment.
What to do
- Ask your clinician or pharmacist before starting.
- Check your home blood pressure for a week before and after.
- Record readings in your journal.
- Rise slowly and stay hydrated.
- Stop and call if you feel faint.
Do not self-adjust medicines
Never stop or change a prescription because of a supplement. See is HoneyPezil safe.
Lifestyle with proven effect
Reduce sodium, move regularly, limit alcohol and keep a healthy weight; see walking for brain health. These matter more for brain and heart than supplements.
When to seek urgent care
Chest pain, severe headache, weakness or confusion needs emergency care.
Frequently asked questions
Sources
- PubMed: Effect of oral L-arginine supplementation on blood pressure, a meta-analysis (2011)
- PubMed: The effects of oral L-arginine and L-citrulline supplementation on blood pressure (2019)
- NIH NHLBI: High blood pressure
General information, not medical advice. Offer details were checked on November 11, 2026; confirm on the order page and read the label on your bottle. See our disclaimer and how we research.