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Flatus frequency is affected by diet, so I was wondering if flatus production solely depends on the food eaten, meaning that some people never ever release flatus because they don't eat any flatus-producing food. I guess if they say they don't, they're probably in denial...

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Have you read the book Gulp by Mary Roach ? Some interesting flatulence research and other researches regarding gut is brilliantly written ! –  biogirl Nov 29 '13 at 10:41
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