钙是人类最早知道的膳食中必需的物质之一,也是人体中含量最多的矿物质。钙除了构成骨骼外,还是人体内最活跃的元素之一,在神经、肌肉的应激,神经冲动的传递,心动节律的维持,血液凝固,细胞粘着等生理过程中起着举足轻重的作用。 根据美国卫生机构和我国营养保健机构推荐的摄钙量,成年人每日应摄取800mg,而我国人民钙的摄取量仅人均500mg/日,人均日缺钙量高达300mg/日。缺钙可引起小儿佝偻病、妊娠高血压综合征、骨质疏松等疾病,而人体有50余种疾病与钙有关。据资料表明,我国3岁以下儿童佝偻病患者患病率平均为40.7％,妇女骨质疏松患者在6000～8000万人,可见“钙饥饿”已 Calcium is one of the earliest known human dietary substances, but also the most abundant minerals in the human body. Calcium is one of the most active elements in the human body. It plays a decisive role in the physiological processes such as nerve and muscle stress, nerve impulse transmission, maintenance of cardiac rhythm, blood coagulation and cell adhesion. According to the recommended amount of calcium intake by the U.S. Department of Health and China’s nutrition and health care institutions, adults should receive 800 mg daily, while calcium intake in our country is only 500 mg per day, and the daily calcium deficiency per capita is as high as 300 mg / day. Calcium deficiency can cause pediatric rickets, pregnancy-induced hypertension syndrome, osteoporosis and other diseases, and the body has more than 50 kinds of diseases and calcium-related. According to statistics, the average prevalence of rickets in children under 3 years of age in China was 40.7%, and the number of women with osteoporosis was in the range of 6,000-80 million. It shows that “calcium starvation” has been