the aim of this study was to evaluate the effect of different intensities of short-term exercise on leptin, insulin, cortisol and lipid profiles in overweight and obese children. 24 overweight and obese boys (mean age 15.5±0.65 years old and bmi: 30.09+2.47 kg/m2) participated in this study. all subjects participated in a graded breath to breath gas-analyzer testing by bruce protocol to measure...

Monitoring blood glucose concentrations is a necessary but tedious task for people suffering from diabetes. It has been noted that breath in people suffering with diabetes has a different odour and thus it may be possible to use breath analysis to monitor blood glucose concentration. Here, we evaluate the analysis of breath using a portable device containing a single mixed metal oxide sensor du...

BACKGROUND Adult-type hypolactasia is caused by genetic lactase non-persistence. It is the most common cause of lactose intolerance, which results in gastrointestinal symptoms after ingestion of dairy products. Currently, lactose intolerance is investigated by the hydrogen breath test (HBT), which is considered the preferred diagnostic test. Adult-type hypolactasia may also be diagnosed by geno...

Fermentation in the large bowel has been postulated to play a protective role against colon cancer. Hydrogen and methane are end products of this fermentation process and are absorbed into the bloodstream and excreted via expired air in the breath. Breath levels of hydrogen and, to a lesser extent, methane correlate strongly with colonic fermentation and may serve as useful biomarkers for this ...

In order to assess the relationship between methane (CH4) producing status and the breath excretion of hydrogen (H2) in healthy subjects, breath CH4 and H2 were simultaneously measured for 14 hours after oral ingestion of 10 g lactulose in 65 young volunteers. Forty were breath CH4 producers and 25 were not. Statistically significant differences were observed between both groups, with lower val...

Twenty-three infants and children aged 21 months to 13 years with chronic diarrhoea and 6 patients without diarrhoea were investigated for lactose malabsorption with the hydrogen breath test (HBT) adapted for use in young infants and children. A further 8 children with proven or suspected coeliac disease were also investigated. The HBT was compared with the histology of the jejunal mucosa, muco...