I¹³¹-Labeled Fat in the Study of Intestinal Absorption

Abstract

CHARACTERISTIC and reproducible curves of radioiodine blood levels have been demonstrated in normal persons after ingestion of an I131-labeled test meal. This is true with the use of both radioactive tagged albumin1 and radioactive tagged fat.2 Furthermore, less than 2 per cent of radioactive material is recoverable in the total feces passed within forty-eight hours after ingestion of a fat test meal.3 After normal controls were established, this method of study was applied to patients who had a variety of disorders of the gastrointestinal tract, to determine whether their radioactive blood levels and fecal content differed significantly from those . . .