盐是一种非常重要的饮食成分。在过去人们不易得到它,而在当今世界里,人们又很难离开它。如同对脂肪的需求一样,人体只要适量的盐即可维持健康和生命。但是,盐(准确些应该是钠)在天然食物中的存在并不多,与其他绝大多数营养成分相比,盐在天然食品中 Salt is a very important dietary ingredient. It was not easy for people to get it in the past, and it is hard for people to leave it in today’s world. Just like the need for fat, the body can maintain its health and life with just the right amount of salt. However, salts (which should be more accurate sodium) do not exist as much in natural foods as salt in natural foods compared to most other nutrients