Likewise there was no significant change in peak levels of methane before (19.5 ppm ±) or after (16.9 ppm ±) gluten-free diet. Conclusion 18.6% of patients presenting with new diagnosis coeliac ...

SIBO can contribute to dyspeptic symptoms and altered bowel habit. The inappropriate fermentation of ingested nutrients in the upper gut produces gas (hydrogen and methane) and short chain fatty acids ...

Results of the glucose breath test, which measures hydrogen and methane levels in the breath, were considered positive for SIBO if 1) the hydrogen or methane peak was >20 ppm when the baseline was ...