Selenium Flashcards
what is selenium
a nonmetal with metallic properties
what are some general sources of selenium
organ meats, seafood, muscle meats, cereals, grains, eggs, milk dairy
what are some excellent sources of selenium
yellow fin tuna, brazil nuts, sworfish, halibut, ottom round beef, white meat chicken
what are good sources of selenium
whole wheat bread, brown/white rice
what are the organic forms of selenium
selenomethionine and selenocystein
what are the inorganic forms of selenium
selenomethionine, selenium methyl selenocystein, sodium selenite, selenium-enriched yeast
how is selenium digested
trick question! it’s not!
what is selenium’s absorption rate
80-97%
how is selenium absorbed
passive diffusion
where is selenium absorbed
SI
what enhances selenium absorption
vitamin C, A, E, low glutathione in intestines
what inhibits selenium absorption
phytic acids, heavy metals
how is selenium transported
inorganic selenium thought to attach to sulfhyryl group of apoporteins, selenoamino acids are free, transport through plasma via albumin
where is selenium stored
liver, kidney, spleen, pancreas, heart, brain, lungs
what populations are at risk for selenium deficiency
regional: china, central africa, europe. pts recieving parenteral nutrition, HIV, cirrosis, inflammatory conditions
