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钙对骨骼、牙齿和细胞的正常功能以及人体内的一些生理生化反应都起着重要作用,是人和动物生存的必需元素。 由于饮食习惯不同,人们从食物中所摄取的钙量有很大区别。在西方国家,通常摄取的钙量每人每天是1000mg以上;而在许多发展中国家,每人每天钙摄取量为300～500mg。我国营养标准要求的摄入量为每天800mg。由于国人常以植物来源的食物为主,食含钙丰富的乳制品较少,钙摄取量远达不到这个水平。 成人对钙的需要量最早是根据钙平衡的研究来估计的。如成年男人每天需要量在126～1020mg之间,而成年妇女每天需要量在550～1067mg之间。当人体摄取钙量低于
Calcium plays an important role in the normal function of bones, teeth and cells as well as some physiological and biochemical reactions in the human body and is an essential element for the survival of humans and animals. Due to different eating habits, the amount of calcium that people take from food is quite different. In western countries, the amount of calcium normally consumed per person per day is more than 1000 mg, whereas in many developing countries, calcium intake per person per day is 300 to 500 mg. China’s nutrition standards require intake of 800mg daily. As people often plant-based food-based foods containing less calcium-rich dairy products, calcium intake far below this level. The earliest calcium requirement in adults was estimated based on calcium balance studies. Such as adult men need daily amount of 126 ~ 1020mg, while adult women daily needs between 550 ~ 1067mg. When the human body takes up less than calcium