Why does a high fiber diet lower blood pressure?

Sam asked:


I already know that a high fiber, low sodium, and low fat diet lowers your blood pressure. DUH. What I can’t seem to find is the reasons these things are true. I’m writing a paper on blood pressure and I’ve found so many great sources, but not one of them tells me the actual physiological reasons that this type of diet lowers blood pressure. If anyone could point me to some sources on this I would really appreciate it. Any doctors out there??? : )

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2 Responses to “Why does a high fiber diet lower blood pressure?”

  1. Loving_Heart on December 30th, 2009 at 1:11 am

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    The reason is that fiber diet maintains the normal motility of intestines and forms a layer on the mucosa so that fat and other stuffs are not absorbed in the body; and are expelled out during defecation.
    This is a strong hypothesis.

  2. wiseowl_00 on December 30th, 2009 at 7:19 am

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    As far as I know, the only one of these things on it’s own that lowers blood pressure is low sodium. Even then this is only of benefit if the problem was due to high sodium in the diet to start with. I think the the high fibre and low fat just claim a bit of the credit from the low sodium aspect.
    As for the actual mechanisms, I’m not too sure. I suppose it’s possible that low sodium means low salt and commercial salt is bleached and has aluminium added to it. It could be speculated that the removal of such a processed substance from the diet has some benefit.

    Try searching using Google Scholar.

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