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G immunity grey places at risk of low vitamin d

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Unformatted text preview: ) absorp:on from intes:ne. –  synthesized by skin from a cholesterol deriva6ve when exposed to sunlight. •  Supplemented by dietary intake. •  Must be ac:vated first by liver and then by kidneys before it can affect the intes6nes. •  Many seasonal paWerns in illness may be linked to vitamin D levels –  many roles beyond calcium, e.g. immunity Grey = places at risk of low vitamin D hWp://www.health.harvard.edu/newsweek/6me- for- more- vitamin- d.htm Precursor in skin (7-dehydroch...
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