- 问题详情:VitaminDhelpsbonesandmusclesgrowstrongandhealthy.LowlevelsofvitaminDcanleadtodiseasessuchasrickets(佝偻病),mainlyfoundinchildren.Thethinningofboneisacommonproblemaspeople,especiallywomen,getolder.ButmoreandmoreresearchissuggestingthatvitaminD...
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