Polyethylene glycol as a quantitative fecal marker in human nutrition experiments
1979
Allen, Lindsay H. | Raynolds, William L. | Margen, Sheldon
Extract: Data are summarized from five experiments in which polyethylene glycol (PEG) was fed to 51 subjects as a quantitative fecal marker. Fecal recovery of PEG averaged only 93 percent of that consumed. PEG was a valid fecal marker for nitrogen, calcium, magnesium, iron, and zinc, but was less valid for sodium. In one experiment where PEG and chromic oxide (CR(sub2)0(sub3)) were fed simultaneously, PEG was excreted faster on average than Cr(sub2)0(sub3). Inclusion of quantitative fecal markers permitted identification of the time when preexperimental diet had been completely eliminated, subjects who showed marked pooling of intestinal contents, and changes in the amount of fecal dry solids.
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