亚洲AV无码一区东京热不卡,精品二区99久久,日韩理论一区二区,亚洲国产精品va麻豆

The two most important forms of vitamin D are vitamin D3 (cholecalciferol) and vitamin D2 (ergot calciferol). In human body, vitamin D3 and D2 combine with vitamin D binding protein in plasma and transport to liver. They are converted into 25 hydroxyvitam

Vitamin D is a kind of sterol hormone, which is produced by skin light. Two important forms of vitamin D include vitamin D3 (cholecalciferol) and vitamin D2 (ergocalcitol). In human body, vitamin binding protein combines with vitamin D3 and vitamin D2, an

Ferritin is a macromolecular protein with a molecular weight of at least 440kd (depending on the amount of iron in it). Serum ferritin is the binding iron in blood. It is the most sensitive index to detect iron deficiency in the body. Determination of fer