所谓微量元素,指的是一些体内含量极少的元素,有的甚至只有痕量。这些元素虽然人体需要量很少,但对健康却有重要意义。目前已发现有14种微量元素是人体所必需的,即铁、锌、铜、锰、铬、钴、硒、镍、碘、氟、锡、钒、钼和硅。随着科学的发展,人们对微量元素的认识还在不断地发展 The so-called trace elements, refers to the very few elements in the body, and some even trace. Although these elements require very little human body, they are of great importance to health. It has been found that 14 kinds of trace elements are necessary for the human body, namely iron, zinc, copper, manganese, chromium, cobalt, selenium, nickel, iodine, fluorine, tin, vanadium, molybdenum and silicon. With the development of science, people’s understanding of trace elements is still evolving