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High Salt Levels Inhibit Blood Flow Mechanisms

March 11, 2009: 03:28 AM EST
A new joint US-Chinese study provides the first direct evidence that high salt intake is linked to high blood pressure (hypertension). Research from the University of Kentucky Medical School and Taishan Medical College, showed that high salt levels in the blood could “significantly” suppress the action of nitric oxide synthase (NOS), an enzyme linked to maintaining healthy blood flow. NOS produces nitric oxide, which enables muscles around blood vessels to relax, boosting blood flow and reducing blood pressure. The study “clearly indicates the importance of lowing salt intake,” says lead author Xiang-An Li, an assistant professor at the Kentucky Pediatric Research Institute. Sodium is necessary to healthy bodily function, as are other metal ions, including potassium, magnesium and calcium. Dr Li says it would be interesting to find out if these ions also inhibit NOS action.
Stephen Daniells, "Scientists lift the lid on salt’s hypertensive power", Food Navigator, March 11, 2009, © Decision News Media SAS
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