General fitness, health and nutrition · Public discussion

Re: antioxidant activity of foods

Started by John Sankey · · Last activity · 2 posts · 310 views

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General fitness, health and nutrition
Published
1 March 2005
Last activity
1 March 2005
Original author
John Sankey
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  1. "I think that it is not so difficult to make an approximate
    estimation about the phytochemical content based on the data that you
    now have."

    True, but meaningless. I see a heap of chemical numbers from your
    references with no relationship whatsoever to human health. The
    individual RDA's for beta-carotene, vitamins C & E, even though
    antioxidants, are all based on criteria other than antioxidant
    activity. I havn't found anywhere, so far, how to relate
    antioxidant/(iso)flavonoid activity as such to human health.

    That's the bottom line. Where can I find numbers to relate these,
    even approximately, to human beings and our health?

    John

  2. Juhana Harju wrote:
    :: John Sankey wrote:
    :::: "I think that it is not so difficult to make an approximate
    :::: estimation about the phytochemical content based on the data that
    :::: you now have."
    ::::
    :::: True, but meaningless. I see a heap of chemical numbers from your
    :::: references with no relationship whatsoever to human health. The
    :::: individual RDA's for beta-carotene, vitamins C & E, even though
    :::: antioxidants, are all based on criteria other than antioxidant
    :::: activity. I havn't found anywhere, so far, how to relate
    :::: antioxidant/(iso)flavonoid activity as such to human health.
    ::::
    :::: That's the bottom line. Where can I find numbers to relate these,
    :::: even approximately, to human beings and our health?
    ::::
    :: In general terms these studies might provide some help:
    ::
    :: Hertog MG et al, Flavonoid intake and long-term risk of coronary
    :: heart disease and cancer in the seven countries study. Arch Intern
    :: Med. 1995 Feb 27;155(4):381-6.
    ::
    :: "RESULTS: Average intake of antioxidant flavonoids was inversely
    :: associated with mortality from coronary heart disease and explained
    :: about 25% of the variance in coronary heart disease rates in the 16
    :: cohorts."
    :: [...]

    On the page 26 of this pdf-file there is an illustrative diagram about
    the flavonoid intake and CHD mortality in the Seven Countries Study. It
    takes a while to open the file.

    http://www.mgsd.net/uk/medias/Crepaldi_Drouin_lecture.PDF

    --
    Juhana

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