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Matti Narkia

Estimation of the dietary requirement for vitamin D in free-living adults >=64 y of age... - 0 views

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    Estimation of the dietary requirement for vitamin D in free-living adults >=64 y of age.
    Cashman KD, Wallace JM, Horigan G, Hill TR, Barnes MS, Lucey AJ, Bonham MP, Taylor N, Duffy EM, Seamans K, Muldowney S, Fitzgerald AP, Flynn A, Strain JJ, Kiely M.
    Am J Clin Nutr. 2009 May;89(5):1366-74. Epub 2009 Mar 18.
    PMID: 19297462
    doi:10.3945/ajcn.2008.27334

    Conclusion: To ensure that the vitamin D requirement is met by the vast majority (>97.5%) of adults aged ≥64 y during winter, between 7.9 and 42.8 µg vitamin D/d is required, depending on summer sun exposure and the threshold of adequacy of 25(OH)D. .
Matti Narkia

How Much Vitamin D3 Do the Elderly Need? -- Viljakainen et al. 25 (5): 429 -- Journal o... - 0 views

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    How much vitamin D3 do the elderly need?
    Viljakainen HT, Palssa A, Kärkkäinen M, Jakobsen J, Lamberg-Allardt C.
    J Am Coll Nutr. 2006 Oct;25(5):429-35.
    PMID: 17031013

    Conclusions: A clear dose response was noted in S-25-OHD to different doses of vitamin D3. The recommended dietary intake of 15 µg is adequate to maintain the S-25-OHD concentration around 40-55 nmol/L during winter, but if the optimal S-25-OHD is higher than that even higher vitamin D intakes are needed. Interestingly, subjects with lower vitamin D status at baseline responded more efficiently to supplementation than those with more adequate status
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