General fitness, health and nutrition · Public discussion

Vitamin supplements not for everyone.

Started by Rich Shewmaker · · Last activity · 3 posts · 371 views

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General fitness, health and nutrition
Published
27 March 2004
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29 March 2004
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Rich Shewmaker
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  1. Check out this new study that indicates that anti-
    oxidant vitamin supplementation may actually be harmful
    for some people.

    eurekalert.orgasft
    vgf032604.php

    I thought Anth might be interested in this.

    --Rich

  2. Just my 2$ Rich

    'More ominously, antioxidants seemed to accelerate artery
    narrowing in diabetic women carrying a pair of haptoglobin-2
    genes. Women without diabetes, however, experienced no
    negative effects from the antioxidants even if they carried
    a double dose of haptoglobin-2.'

    Maybe a long term mortality study would clear this up?

    medicalnewstoday.comyouropinions.php
    ionid=3897

    I thought that most heart attacks were caused by ruptures in
    plaques, and not narrowing arteries? It didn't mention
    plaques really, just narrowing of the arteries and concluded
    that this increases risk of atherosclerosis? I'd ask do
    people with more narrow arteries have higher risk of death
    from heart attacks?

    See :-

    lef.orgfeatured
    articles/may2000_vitamin_c_01.html

    At a meeting of the American Heart Association held on March
    2, 2000, a presentation was made of an unpublished trial
    indicating that those who consumed high amounts of vitamin C
    supplements had increased carotid intima-media wall
    thickening over an 18-month time period. 41 The doctors who
    made this presentation described high amounts of vitamin C
    as up to 500 mg a day. This presentation contradicts
    previous published studies showing that vitamin C protects
    against carotid atherosclerosis and intima-media wall
    thickening. 42

    Also see The new research may help clear up some of the
    controversy surrounding the use of antioxidant vitamins in
    patients with heart disease. Some previous studies suggest
    that antioxidant doses can prevent the progress of
    atherosclerosis, while the majority of studies have shown
    there is no benefit from taking antioxidants. Other studies
    suggest that the vitamins can actually speed up the course
    of heart disease by interfering with blood cholesterol
    levels and the effect of cholesterol lowering drugs.

    Also

    jbc.org7127

    What this is saying that that the concentration of ascorbic
    acid (vitamin C) is proportional to inhibiting the enzyme
    HMG-COA Reductase. This is the same effect that Lipitor and
    Zocor have - and explains why vitamin c predictably reduces
    cholesterol, so would it not be by the same argument that
    these drugs would be dangerous in these diabetics?

    Cheers

    Anth

    "Rich Shewmaker" <[email hidden]> wrote in message news:fJGdnYuGtOw5O_jdRVn-
    [email hidden]...

    Quoted message said:

    Check out this new study that indicates that anti-
    oxidant vitamin supplementation may actually be harmful
    for some people.

    eurekalert.orgasft
    vgf032604.php

    I thought Anth might be interested in this.

    --Rich

  3. Also if you have complaints about dosage and RDA, why take
    more than the RDA ncbi.nlm.nih.govquery.
    fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=15029029
    This hint at higher doses to treat diseases. I seem to
    recall that the common argument is 'plasma concentration
    peaks at whatever.' so why take more because it's wasted
    etc. . Anth

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