scientists have know for a long tim

scientists have know for a long time that vitamin D is essential for humans.if children a vitamin D or calcium deficiency,they develop rickets,a softening of the bones.New studies are showing that people of all ages need vitamin D to help them fight off diseases by keeping their immune systems storng

scientists have know for a long time that vitamin D is essential for humans.if children a vitamin D or calcium deficiency, they develop rickets, a softening of the bones.New studies are showing that people of all ages need vitamin D to help them fight. off diseases by keeping their immune systems storng.

Scientists have know for a long time that vitamin D is essential for humans.if children a vitamin D or, calcium deficiency they. Develop rickets a softening, of the bones.New studies are showing that people of all ages need vitamin D to help them fight. Off diseases by keeping their immune systems storng





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