钙是人体所需的重要物质,钙缺乏能引发多种疾病。人缺钙不行,但补多了,也不是好事。其实我们每天并不一定要特意去吃那些标榜高钙的食物,一些天然食物中就已富含高钙质。牛奶、瘦肉、鱼、虾……这些都是高质量的食物,为我们提供了充分的钙。对于一个正常成年人来说,一天喝一到两杯250毫升的鲜牛奶,其中的钙质就足够了。报载,非洲的居民没有钱去买鲜奶等富含钙质的食物,但却很少有人患骨质疏松等毛病,非洲那么多优秀中长跑运动员便是最好的例证。对此,医学家及营养师认为,这是因为非洲运动充足,吃的食物中钙质不多,但吸收利用率却非常高。事实证明:吃天 Calcium is an important substance needed by the body, and calcium deficiency can cause many diseases. Calcium deficiency is not enough, but make up more, nor is it a good thing. In fact, we do not have to deliberately eat every day those advertised high calcium foods, some natural foods have been rich in high calcium. Milk, lean meat, fish, shrimp ... These are high-quality foods that provide us with adequate calcium. For a normal adult, one or two 250ml fresh milk a day, the calcium is enough. According to the newspaper, residents in Africa have no money to buy foods rich in calcium such as milk, but very few people suffer from osteoporosis. So many excellent middle-distance runners in Africa are the best examples. In this regard, medical scientists and nutritionists believe that this is because Africa is adequate exercise, eat less calcium in food, but the absorption rate is very high. Facts have proved: eat days