Biotransformation D3- vitamin metaboliseres hurtigt ved hydroxylering i leveren til 25- hydroxyvitamin D3 og metaboliseres efterfølgende i nyrerne til 1, 25- dihydroxyvitamin D3, som repræsenterer den biologisk aktive form.
Biotransformation Vitamin D3 is rapidly metabolized by hydroxylation in the liver to 25-hydroxyvitamin D3, and subsequently metabolized in the kidney to 1,25-dihydroxyvitamin D3, which represents the biologically active form.