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老人补钙有讲究 钙是人体必需元素,成年人体内含钙总量约1000克左右,其中99％分布在骨骼牙齿中,1％存在血液和软组织中。人体内钙的代谢从出生到20岁是正钙平衡期,骨骼生长旺盛,钙吸收超过排泄。中年后出现负钙平衡期。老年人胃肠功能减弱,肠道中钙吸收不完全,性激素分泌降低,户外活动减少,因此容易造成缺钙。 老年人缺钙的特点,是骨骼钙减少,血钙和细胞内钙含量增加,这是人体衰老的特征;骨骼缺钙引起骨质疏松和骨质增生,持续发展引起脊柱畸形出现驼背或
Calcium is an essential element of the human body, Calcium is an essential element of the human body, the total amount of calcium in adults about 1000 grams, of which 99% distributed in bone teeth, 1% of the existence of blood and soft tissue. Calcium metabolism in humans from birth to 20 years of positive calcium balance period, strong bone growth, calcium absorption over excretion. Middle-aged after negative calcium balance. Weakened gastrointestinal function in the elderly, intestinal calcium absorption is not complete, reduce the secretion of sex hormones, outdoor activities to reduce, so likely to cause calcium deficiency. Calcium deficiency in the elderly is the result of reduced bone calcium, calcium and intracellular calcium content increased, which is the characteristics of human aging; bone calcium deficiency caused by osteoporosis and bone hyperplasia, sustained development caused by kyphosis or kyphosis