GSH-perossidasi e selenio
Digestion and Absorption of Micronutrients, 2021
Selenium
Selenium is found primarily in association with amino acids. Approximately 60% of dietary selenium is absorbed and the major sites for uptake are believed to be in the jejunum and ileum. Selenium deficiency has been reported in China (Keshan disease, an endemic cardiomyopathy), where there is very little naturally occurring selenium in the soil and water. For unclear reasons, this disease is not prevalent in New Zealand where selenium is also sparse.5,355 Absorption of selenium occurs rapidly when it is ingested associated with amino acids, as in selenomethionine, probably by active transport mechanisms operative for the amino acid. Inorganic selenium is absorbed more slowly, possibly by simple diffusion.
