The research done by scientists at Bristol University suggested the traditional belief that the cause of hypertension lay with the heart may not be true anymore.Scientists isolated a protein (JAM-1) located in the brain. They discovered the protein trapped white blood cells.
Once trapped the blood cells could cause inflammation, obstructing blood flow leading to poor oxygen supply to the brain which, in turn,trigger the condition that raise blood pressure.
Anyway, eating low fat foods, reducing salt intake and undertaking regular exercise are always beneficial to you who wish to reduce the risk of high blood pressure. Link to BBC and Sky
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