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人们在防治骨质疏松症时首先想到的就是补钙.这是因为随着年龄的增长,影响钙代谢的因素逐渐显著。这些因素包括:(1)绝经后妇女雌激素水平大幅度下降。骨钙释出增加.即钙由骨进入血循环的量大于沉积于骨。使人体骨钙代谢处于负平衡。每年丢失2％至3％骨量。(2)老年人不论男女由于消化系统退化。进食的种类和数量减少.吸收功能下降.老化的小肠上皮细胞对活化维生素D反应减低以及因肾功能下降产生的活化维生素D减少.造
The first thing people think of when it comes to preventing and treating osteoporosis is calcium, which is because the factors that affect calcium metabolism become more pronounced with age. These include: (1) a significant reduction in estrogen levels in postmenopausal women. Increased release of bone calcium, that calcium from the bone into the blood circulation is greater than the amount deposited in the bone. The human bone calcium metabolism in a negative balance. Lost 2% to 3% of bone mass per year. (2) Elderly people, both men and women due to digestive deterioration. Decreased number and type of food intake, reduced absorption, decreased response of aged small intestinal epithelial cells to activated vitamin D, and decreased activated vitamin D due to decreased renal function.