Nitric oxide (NO) is the small “relax” signal your artery lining uses to widen blood vessels and ease blood flow. In high blood pressure, that signaling is often blunted [Hermann, …
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endothelial function
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Here is the short version. Nitric oxide (NO) is a tiny signal your blood vessel lining releases to tell arteries to relax, and when that signal works well, blood moves …
