Fecal hydrogen production and consumption measurements. Response to daily lactose ingestion by lactose maldigesters

Steven R. Hertzler, Dennis A. Savaiano, Michael D. Levitt

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

The alteration of hydrogen (H2) metabolism, which accounts for the large decrease in breath H2 excretion following prolonged ingestion of malabsorbed carbohydrate (lactulose, lactose in lactose maldigesters) was studied in six lactose-maldigesting adults. Metabolic inhibitors of the three main H2-consuming reactions (methanogenesis, sulfate reduction, and acetogenesis) were used to independently measure H2 production and consumption in fecal samples obtained after 10 days of either dextrose or lactose feeding. Absolute fecal H2 production (net of production minus consumption) after 3 hr of incubation with lactose was approximately threefold lower after lactose adaptation (242 ± 54 μl) compared to dextrose adaptation (680 ± 79 μl, P = 0.006). Fecal H2 consumption was not affected by either feeding period. We conclude that decreased absolute H2 production, rather than increased H2 consumption, is responsible for the decrease in breath H2 observed with lactose feeding.

Original languageEnglish (US)
Pages (from-to)348-353
Number of pages6
JournalDigestive Diseases and Sciences
Volume42
Issue number2
DOIs
StatePublished - 1997

Bibliographical note

Funding Information:
Supported in part by the Department of Veterans Affairs, the National Institute of Diabetes and Digestive and Kidney Disease (RO1-DK-13309), and the University of Minnesota Agricultural Experiment Station (18-016).

Keywords

  • colonic adaptation
  • hydrogen production
  • lactose maldigestion

Fingerprint Dive into the research topics of 'Fecal hydrogen production and consumption measurements. Response to daily lactose ingestion by lactose maldigesters'. Together they form a unique fingerprint.

Cite this