有哪些信誉好的足球投注网站Effect of fiber on breath hydrogen response and symptoms after oral lactose in lactose malabsorbers..pdf
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Effect of fiber on breath hydrogen response and symptoms after oral lactose in lactose malabsorbers.
1347
Effect of fiber on breath hydrogen response and
symptoms after oral lactose in lactose
malabsorbers1
Khoi N. Nguyen, M.D., Jack D. Welsh, M.D., Carl V. Manion, M.D., and
Vernon J. Ficken, M. S.
ABSTRACT The effect of ingesting cellulose, pectin, and psyhhium with orally administered
lactose in water or milk was tested in six lactose mahabsorbers. Breath hydrogen tests were used to
evaluate lactose malabsorption and mouth-to-cecum transit times. Addition of psyllium significantly
reduced the breath hydrogen response, and symptoms in each subject: whereas, less diminution of
expired hydrogen was seen after cellulose or pectin was added. The effect of each fiber on gastric
emptying rates of an equal volume liquid meal was evaluated in three volunteers. Pectin had no
effect, while the cellulose and psyhlium modestly delayed emptying at approximately 30
mm. Am J (‘un Nuir 1982;35:1347-l35I.
KEY WORDS Fiber, breath hydrogen. lactose malabsorption
Introduction
Adult lactose malabsorbers frequently ex-
hibit wide variations in symptom severity (1),
which appear to be related to the dose of
lactose ingested (2), the lactose vehicle (3),
and to foods consumed at the same time.
Several dietary fibers have a beneficial influ-
ence on carbohydrate metabolism (4), dimin-
ish carbohydrate malabsorption in postgas-
trectomy patients (5, 6), and decrease diar-
rhea from tube feeding (7). Therefore, studies
of the effects of three fibers (cellulose, pectin,
and psyllium) on lactose malabsorption were
undertaken. The responses from lactose and
fiber coadministration were assessed using
the breath hydrogen test (8) and development
of symptoms. In addition, the influence of the
same fibers on gastric emptying was evalu-
ated.
Patients and methods
Six men, three Black and three Vietnamese,
ranging in age from 18 to 49 yr, participated
in the study of fiber’s effect on lactose ma!-
absorption. The diagnosis of lactose malab-
sorption in each subject was established by
an oral lactose
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