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by vixin 4295 days ago
'the body can make Vitamin D by itself'. Sorry for underlining the obvious but no, it can't. It needs sunlight and the prevalence of rickets (as a result of vit D deficiency) in women who by custom, habitually cover themselves and live in somewhat sun-free England is a demonstration of this.

http://news.bbc.co.uk/2/hi/uk_news/england/1936208.stm