Experimentally observed vitamin D requirements are higher than extrapolated ones.
Vieth
Reinhold
R
D000368:Aged; D006801:Humans; D006887:Hydroxycholecalciferols / Q000097:blood*; D009751:Nutritional Requirements; D012107:Research Design; D014807:Vitamin D / Q000008:administration & dosage*
D006887:Hydroxycholecalciferols; D014807:Vitamin D