My vitamin D levels are at 15.6 ng/ml therefore I'm deficient, how much should I take and how often in your experience? - Quora
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Single bout of exercise triggers the increase of vitamin D blood concentration in adolescent trained boys: a pilot study | Scientific Reports
![Frontiers | Global and regional prevalence of vitamin D deficiency in population-based studies from 2000 to 2022: A pooled analysis of 7.9 million participants Frontiers | Global and regional prevalence of vitamin D deficiency in population-based studies from 2000 to 2022: A pooled analysis of 7.9 million participants](https://www.frontiersin.org/files/Articles/1070808/fnut-10-1070808-HTML-r1/image_m/fnut-10-1070808-g001.jpg)
Frontiers | Global and regional prevalence of vitamin D deficiency in population-based studies from 2000 to 2022: A pooled analysis of 7.9 million participants
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