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The first study of its kind has found that people who vape have the same mix of gut bacteria as non-smokers, whilst smokers have significant changes to their microbiome. The international team of researchers led by Newcastle University, analysed the bacteria of tobacco smokers, users of e-cigarettes and non-smokers from samples throughout the digestive tract, including in the mouth and gut.

Significant changes were found in the gut bacteria of the smokers, [...]