Vitamin D: how much do we need, and how much is too much?
Heaney
R P
RP
D000367:Age Factors; D019587:Dietary Supplements; D006801:Humans; D006887:Hydroxycholecalciferols / Q000097:blood; D008875:Middle Aged; D018673:Nutrition Policy; D017410:Practice Guidelines as Topic; D014807:Vitamin D / Q000008:administration & dosage*; D014808:Vitamin D Deficiency / Q000178:diet therapy*
D006887:Hydroxycholecalciferols; D014807:Vitamin D