American Journal of Clinical Nutrition, Vol 53, 748-754, Copyright © 1991 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Selenium distribution in blood fractions of New Zealand women taking organic or inorganic selenium

JA Butler, CD Thomson, PD Whanger and MF Robinson
Department of Agricultural Chemistry, Oregon State University, Corvallis 97331.

Three groups of 11 New Zealand women each received, for 32 wk, yeast tablets with no added selenium (placebo) or 200 micrograms Se/d in tablets either as selenate or as selenium-enriched yeast (SeMet) in a double-blind selenium trial. Plasma and erythrocyte (RBC) samples were collected bimonthly. Gel filtration of plasma from women taking SeMet revealed two major selenium-containing peaks with most of the selenium in the second peak. In contrast, the first peak contained most of the selenium in plasma from women taking selenate. Chromatography of RBC lysates indicated that the majority of the selenium was with hemoglobin (Hb) in women taking SeMet but was about equally distributed between glutathione peroxidase (GSH-Px) and Hb in women taking selenate. The percentage of selenium associated with GSH-Px was found to be greater in RBCs and plasma of women taking selenate than of those taking SeMet.

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