Vithamine D ke vithamine hape ke hormone ea steroid, haholo-holo e kenyeletsang VD2 le VD3, eo taeo ea eona e tšoanang haholo. Vithamine D3 le D2 li fetoleloa ho 25 hydroxyl vithamine D (ho kenyeletsoa 25-dihydroxyl vithamine D3 le D2). 25-(OH) VD 'meleng oa motho, taeo e tsitsitseng, khatello e phahameng. 25-(OH) VD e bonahatsa kakaretso ea vithamine D, le matla a ho fetola vithamine D, kahoo 25-(OH) VD e nkoa e le pontšo e ntle ka ho fetisisa ea ho hlahloba boemo ba vithamine D. The Diagnostic Kit e thehiloe holim'a immunochromatography mme e ka fana ka sephetho nakong ea metsotso e 15.