Pork, mutton, duck eggs, chicken liver, selenium-enriched rice, black sesame seeds, black beans, black rice, konjac flour, salmon roe sauce, squid, sea cucumber, dried clam, mussel, pig kidney, cuttlefish, pine mushroom, swimming crab, autumn clam, oyster, silver clam and sea crab.

Selenium is a nonmetallic element with the chemical symbol Se, which is located in the fourth periodic VI A group (element 34) in the periodic table of chemical elements. It can be used as photosensitive materials, catalysts for electrolytic manganese industry, essential nutrients for animals and beneficial nutrients for plants. Selenium exists in nature in two ways: inorganic selenium and plant active selenium. Inorganic selenium generally refers to sodium selenite and sodium selenite, which are obtained from the by-products of metal deposits; The latter is formed by combining selenium with amino acids through biotransformation, and generally exists in the form of selenomethionine.