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Medical Forum / General / Vision / February 2008taking Lutein and Beta-Carotene together: why not?
"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 On Feb 5, 9:59 pm, Herbert.Ko...@gmail.com wrote: > "Macular Degeneration" by Drs. Mogk advises cryptically and > parenthetically on page 116 (Jan 2003) that one take Lutein [quoted text clipped - 5 lines] > Thanks in advance, > Herbert ....because they compete with each other for absorption. > On Feb 5, 9:59 pm, Herbert.Ko...@gmail.com wrote: > [quoted text clipped - 9 lines] > > ....because they compete with each other for absorption. 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! On Feb 6, 12:28 pm, Herbert.Ko...@gmail.com wrote: > Dr. Leukoma, > by "compete" do you mean to say that if one swallowed a molecule [quoted text clipped - 3 lines] > publications? > Thanks again! 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. > 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. If beta-carotene is not found in the eyes, why is it touted for the health of the eyes? > If beta-carotene is not found in the eyes, why is it touted for > the health of the eyes? 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. > > If beta-carotene is not found in the eyes, why is it touted for > > the health of the eyes? [quoted text clipped - 6 lines] > vitamin A is necessary for the proper function of the rods and cones, > lutein may actually extend the life of the macula. Had a feeling it was a chemical conversion thing, thanks for the clarification. |
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