Absorption of Selenium from Wheat, Garlic, and Cod Intrinsically Labeled with Se-77 and Se-82 stable Isotopes

Tom E Fox, Caroline Atherton, Jack R Dainty, D John Lewis, Nicola J Langford, Malcolm J Baxter, Helen M Crews, Susan J Fairweather-Tait

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

There is limited information on the absorption of selenium from different foods in humans because of technical difficulties associated with isotopic labeling of dietary selenium. Wheat, garlic, and cod fish were intrinsically labeled with Se-77 or Se-82 stable isotopes. Labeled meals were fed in random order to 14 adults, with a minimum washout period of six weeks between each test meal. Apparent absorption was measured as luminal loss using a fecal monitoring technique over an 8-day period. Plasma appearance of the isotope was measured at 7, 24, and 48 hours post-ingestion. Selenium absorption (± SD) was significantly higher (p < 0.001) from wheat (81.0 ± 3.0%) and garlic (78.4 ± 13.7%) than from fish (56.1 ± 4.3%). Lowest plasma concentration was observed after the fish meal at all three time points, with a peak at 24 hours, whereas wheat produced the highest plasma concentration at all three time points and peaked at 7 hours. Selenium absorption from wheat and garlic was higher than from fish, and inter-individual variation was low. Form of selenium and food constituents appear to be key determinants of post-absorptive metabolism.
Original languageEnglish
Pages (from-to)179-186
Number of pages8
JournalInternational Journal for Vitamin and Nutrition Research
Volume75
Issue number3
DOIs
Publication statusPublished - May 2005

Keywords

  • Adult
  • Animals
  • Female
  • Gadus morhua
  • Garlic
  • Humans
  • Intestinal Absorption
  • Isotope Labeling
  • Isotopes
  • Male
  • Meat
  • Middle Aged
  • Seeds
  • Selenium
  • Sodium Selenite
  • Triticum

Cite this