Selenium(Se),as one of the essential nutrient element in the human body,exists in nature with different chemical forms,such as selenite(Se^4+),selenite(Se6+),and elemental selenium(Se0).Nano-selenium(Nano-Se),a kind of red elemental selenium at the nanometer scale,exhibits excellent characteristics,including low toxicity,safety,higher biological activity and easy absorption compared with traditional inorganic selenium and has a wide application prospect in food and other fields.Based on these,the purpose of this paper:(1)to introduce the unique functional properties of Nano-Se;(2)to summarize ...