Omega 3 fatty acids (docosahexaenoic and eicosapentaneoic acids) are found in oily fish. Studies indicate that they may have specific benefits for many medical conditions, including hypertension. They appear to help keep blood vessels flexible and may help protect the nervous system. Fatty acids are also available in supplements, but their long-term effects on blood pressure are unknown.
For more information, see this recent SharePost by Dr. William Davis:
Japanese Fish Oil Study: More Omega-3, Fewer Heart Problems
http://www.healthcentral.com/heart-disease/c/1435/35562/japanese-fish
Best regards,
Maria
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