The prevalence of Vitamin D deficiency and effects of ultraviolet light on Vitamin D levels in elderly Turkish population
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Archives of Gerontology and Geriatrics, Volume 40, Issue 1 , Pages 53-60, January 2005
24 senior woman, average age 73. 158 nmols/l ± 108 = 63 ng/ml ±43
It appears that some peoples around the world still get outdoors enough to get lots of vitamin D