Seasonal variation of vitamin D among healthy adult men in a subtropical region.
Tiago Oselame FontaniveNidea Rita Michels DickMariana Costa Silva ValenteVani Dos Santos LaranjeiraMarina Venzon AntunesMarcelo de Paula CorrêaRita de Cássia Marques AlvesRafael LindenTania Weber FurlanettoPublished in: Revista da Associacao Medica Brasileira (1992) (2021)
In a Brazilian subtropical region, a seasonal variation in 25(OH)D3 was observed in healthy adult males, although they spent at least 50 min outdoors twice a week, wearing shorts and T-shirts. 25(OH)D3 <20ng/mL was 21.7% in autumn; D-vitD 30 days prior to blood sampling was the only factor independently associated with 25(OH)D3 levels.
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