Ortuño J, Ros G, Periago M J, Martínez C, López G, Rodrigo J
Bromatología e Inspección de Alimentos, Facultad de Veterinaria, Universidad de Murcia, España.
Arch Latinoam Nutr. 1997 Mar;47(1):6-13.
Selenium is an important trace element that was considered toxic for humans and animals for a long time. The best known biochemical role of selenium is, as a selenocysteine residue, to be a part of the active site of the enzyme glutathione peroxidase (GSH-Px). The highest values of selenium have been found in protein foods (meat and fish); although selenium from vegetables sources are more available than from the other foods. Nowadays are not known exactly the recommended dietary allowances for humans, mainly for children. The selenium intake in Spain is 221 micrograms/person/day and the plasmatic values of Spanish people (87 +/- 14 micrograms/L) are within the European average (85 micrograms/L).
硒是一种重要的微量元素，长期以来被认为对人和动物有毒。硒最广为人知的生化作用是作为硒代半胱氨酸残基，成为谷胱甘肽过氧化物酶（GSH-Px）活性位点的一部分。在蛋白质类食物（肉类和鱼类）中发现的硒含量最高；不过蔬菜来源的硒比其他食物中的硒更易被人体吸收。目前尚不清楚人类，尤其是儿童的确切膳食推荐摄入量。西班牙的硒摄入量为每人每天221微克，西班牙人的血浆硒值（87±14微克/升）处于欧洲平均水平（85微克/升）之内。
