ʻO Vitamin D kahi Vitamin aʻo ia nō hoʻi ka stetrone,ʻo ka stetroone, nui e komo pū me VD2 a me VD3,ʻo ia ka mea like. Ua hoʻohuliʻiaʻo Vitamin D3 a me D2 i 25 hydroxyl vitamin D (me 25-dillimDroxyl vitamin D3 a me D2). 25- (Oh) vd i ke kino kanaka, keʻano stable, stable, kiʻekiʻe. 25- (Oh) e hōʻike ana i ka nui o ka nui o ka vitamin D, a me ka hoʻololiʻana o ka Vitamin D, no lailaʻo VD immusochromatography a hiki ke hāʻawi i kahi hopena i loko o 15 mau minuke.