taking Lutein and Beta-Carotene together: why not?

Discussion in 'Optometry Archives' started by Herbert.Kocks, Feb 6, 2008.

  1. "Macular Degeneration" by Drs. Mogk advises cryptically and
    parenthetically on page 116 (Jan 2003) that one take Lutein
    "at a different time from Beta-Carotene." Can anyone explain
    the reason for this separation in time? It is remarkable that
    eye vitamins on the market contain both Lutein and Beta-Carotene
    in the same capsule.

    Thanks in advance,
    Herbert
     
    Herbert.Kocks, Feb 6, 2008
    #1
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  2. Herbert.Kocks

    Dr. Leukoma Guest

    ....because they compete with each other for absorption.
     
    Dr. Leukoma, Feb 6, 2008
    #2
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  3. Dr. Leukoma,
    by "compete" do you mean to say that if one swallowed a molecule
    of Lutein and a molecule of Beta-Carotene together that only one
    molecule would be absorbed? Or is it that they combine into something
    inert and useless? Can you cite any germane studies or
    publications?
    Thanks again!
     
    Herbert.Kocks, Feb 6, 2008
    #3
  4. Herbert.Kocks

    Dr. Leukoma Guest

    By 'compete' I mean dilution. If you really want the lutein and not
    the beta-carotene because beta-carotene is not found in the eye, then
    you don't want to dilute the lutein available for absorption with
    something that will compete with it. That's pretty much all I know,
    which isn't much.
     
    Dr. Leukoma, Feb 6, 2008
    #4
  5. Herbert.Kocks

    Guest Guest



    If beta-carotene is not found in the eyes, why is it touted for
    the health of the eyes?
     
    Guest, Feb 8, 2008
    #5
  6. Herbert.Kocks

    Dr. Leukoma Guest

    Beta-carotene as a provitamin can be converted to retinal and then to
    retinoic acid where it participates in the function of the
    photoreceptors, i.e. rods and cones. Lutein may act as a free-radical
    scavenging agent within the retina, thereby possibly offering some
    protection against the effects of UV radiation. Thefore, while
    vitamin A is necessary for the proper function of the rods and cones,
    lutein may actually extend the life of the macula.
     
    Dr. Leukoma, Feb 8, 2008
    #6
  7. Herbert.Kocks

    Guest Guest




    Had a feeling it was a chemical conversion thing, thanks for the
    clarification.
     
    Guest, Feb 9, 2008
    #7
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