【使身体 保持体钙 正平衡的 7大主要因素：~~ 】

Three hormones and factors that  keep positive blood calcium balance in human



1,25-Dihydroxycholecalciferol,

parathyroid hormone (PTH), and

calcitonin that originate respectively from the liver and kidneys, parathyroid glands, and thyroid glands.



The first, 1,25-Dihydroxycholecalciferol (active vitamin D3), serves to increase calcium absorption from the intestine.



The second, PTH, dissolves bone into the blood.



The third, calcitonin, prevents the bone-derived calcium from being resorbed ("reabsorbed")

into the bone from which it came via PTH.



To summarize, these three hormones act in concert to raise calcium levels via external and internal routes. 



The fourth,  approch and maintain the right calcium-phosphorus ratio : 2 to 1.



The physical activity, the active in and out of the calcium from the bone mass structures,



The fifth, the Sun, again, exposure to the sun, the vitamin D, D3, the activity,  



The sixth, the open and optimistic attitude to life (ups and downs) all played an important role in calcium metabolism.



The seventh, in women, approperiate level of estrogen and progestin is still needed.



The eighth, yet unknown or unclear factors.









【2013-06】