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nightsurfer on 2009-09-01How 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.
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