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微量元素或称痕量元素是指在生物组织中的元素浓度数量级在μg～mg/kg范围的元素。近年来微量元素在人类营养中作用的评价逐渐增强,至今发现在人体内微量元素约为41种,其中14种是人类和动物所必需的。它们为氟、碘、铁、铜、锰、钴、钼、硒、铬、锡、锶、钒。其中绝大多数与体内有机物构成复合物,如酶、激素等参与机体的正常生理与生化功能。当这些必需微量元素缺乏或过多时,均可能导致机体多系统功能紊乱或毒性作用。本文拟就必需微量元素硒与健康及疾病的关系作一综述。
Trace elements or trace elements refer to elements in the biological tissue in the order of elemental concentrations in the range of μg to mg / kg. In recent years, the evaluation of the role of trace elements in human nutrition has been gradually enhanced, so far found in the human body about 41 kinds of trace elements, of which 14 are necessary for humans and animals. They are fluorine, iodine, iron, copper, manganese, cobalt, molybdenum, selenium, chromium, tin, strontium, vanadium. Most of them form a complex with the body of organic compounds, such as enzymes, hormones involved in the body’s normal physiological and biochemical functions. When these essential trace elements are deficient or excessive, they can cause multiple systemic dysfunctions or toxic effects in the body. This article intends to review the relationship between essential selenium and health and disease.