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Nitric Oxide and Your Blood Vessels, Explained

By the BloodPril Editorial Team. Updated September 2026. Checked against the published Supplement Facts panel.

Quick answer: Nitric oxide is a signal made by cells lining blood vessels from arginine. It relaxes the muscle in vessel walls, widening them and easing blood flow. Exercise and a vegetable-rich diet support it.

The basics

Endothelial cells make nitric oxide, which relaxes smooth muscle in the vessel wall.

What affects it

Age, smoking, high blood sugar and inactivity reduce it. Regular exercise and nitrate-rich vegetables such as beets and leafy greens support it.

Where supplements fit

Arginine and citrulline are raw materials; they help most when levels are low. See the research.

General information, not medical advice. BloodPril is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease.

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