an experimental procedure using stable isotope-labeled cholesterol ( 13c and d ) was carried out on 15 healthy subjects to distinguish the different origins of neutral fecal sterols in man : nonabsorption of dietary cholesterol , fecal excretion by transfer of plasmatic cholesterol and external secretion of cholesterol biosynthetized in digestive tract and directly eliminated .
C0008395
dietary cholesterol
C0008377
cholesterol