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nightsurfer on 2009-12-01Is a lower dose of vitamin D supplementation enough to increase 25(OH)D status in a sunny country?
Pignotti GA, Genaro PS, Pinheiro MM, Szejnfeld VL, Martini LA.
Eur J Nutr. 2009 Nov 28. [Epub ahead of print]
CONCLUSION: The dose given (400 IU/day) was not enough to achieve 25(OH)D concentration, considered optimal for bone health.