The effect of vernal solar UV radiation on serum 25-hydroxyvitamin D concentration depends on the baseline level: observations from a high latitude in Finland.

Int J Circumpolar Health · 2017 · PMC5328343 · PMID 28452681

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highly significantno p-value reported

Contrary to the previous study [ 10 ], in our subjects the increase of S-25(OH)D levels below 90 nmol/L was highly significant and strengthens the evidence of the vitamin D effects of vernal UVR.

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