Are you prone to putting on kilos? Your breath can tell

WASHINGTON: The content of your breath may indicate how susceptible you are to weight gain, according to a new study led by an Indian-origin researcher. People whose breath has high concentrations of both hydrogen and methane gases are more likely to have a higher body mass index and percentage of body fat, according to the study.

The combination of the two gases signals the presence of a micro-organism that may contribute to obesity.

A person exhales larger amounts of hydrogen and methane gases when a microorganism called Methanobrevibacter smithii (M smithii) colonises the digestive tract. Previous research has shown that M smithii is the predominant organism in the human gastrointestinal tract responsible for methane production.

"Normally, the collection of micro-organisms living in the digestive tract is balanced and benefits humans by helping them convert food into energy," said lead author Ruchi Mathur, director of the Outpatient Diabetes Treatment and Education Center in the Division of Endocrinology at Cedars-Sinai in Los Angeles.

"When M smithii becomes overabundant, it may alter the balance in a way that makes the human host more likely to gain weight and accumulate fat," Mathur said.

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