Cholesterol absorption measurements were carried out in a free-living out-patient population by a plasma isotope-ratio method previously validated for in-patients (Samuel, P., J. R. Crouse and E. H. Ahrens, Jr., 1978. J. Lipid Res. 19: 82-93). To test the reproducibility of the method in out-patients, 18 patients were tested twice: the mean intra-assay variability was +/- 6.0%. The method was t...
