Study claims beans don’t make you fart after all.

By Seriously Science | April 18, 2018 6:00 am
Image: Flickr/Marco Verch

Image: Flickr/Marco Verch

Beans, beans, the musical fruit! The more you eat, the more you toot! Well, not according to this oldie-but-goody study (published in 1984, doubleplusgood!). Here, scientists had 12 men eat kidney beans for 23 days and measured how much they farted. It turns out that the gas quantity didn’t change during that time, no matter if the men typically ate a lot of beans or not. However, the longer they ate the beans, the better they felt (less discomfort). So let’s eat beans for every meal!

Influence of frequent and long-term consumption of legume seeds on excretion of intestinal gases.

“The objective of this study was to determine the influence of long-term and frequent consumption of legume seeds on the excretion of fermentation gases. This was done by comparing gas excretion for one group (B) of individuals that habitually consumed legumes to that of another group (NB) of individuals that only infrequently consumed legumes. Gas excretion was measured during one diet period (control) when they consumed their normal diets and during one diet period (bean) when they consumed 100 g (dry weight), daily, of red kidney beans. Twelve men participated in this study on an outpatient basis and received each diet for 23 days. We found that there was neither short-term (no difference throughout the 23 days) nor long-term (NB and B groups were equivalent) adaptation in the quantity of gas that was excreted. However, both groups subjectively expressed greater tolerance and less physical discomfort as the bean-consuming period continued.”

Related content:
To fart or not to fart: that is the question.
Do old people fart more? Here comes the science.
Do farts carry germs? Well, it depends on whether you are wearing pants.

CATEGORIZED UNDER: eat me, ha ha poop
  • OWilson

    Beans and peas are vegetable matter,

    Ask a cow if vegetable matter produces farts!

    More studies needed!

  • Joseph Hertzlinger

    Sample size 12?

    • Uncle Al

      No females sampled? A third century ago? Kidney beans? No gas sampling analysis (re swallowed nitrogen)?

      No fetish photo of the sampling hardware? No metal gauze backflash arrestors (re Davy lamp)? I’ve seen better science in purple liquid hog manure impoundment ponds. Alternative renewable diversity photosynthesis!


  • Uncle Al

    Intestinal flatus derives from in situ fermentation of raffinose found in beans, cabbage, brussels sprouts, broccoli, asparagus.

    Humans, pigs. and poultry lack the enzyme α-GAL. Undigested raffinose enters the lower intestine, then bacterial fermentation to CO2, CH4, and H2. Beano is α-GAL. Cut the crap.

  • Not_that_anyone_cares, but…

    “…make you fart after all.”

    I am not concerned with “after”.

  • dawdler

    I had a lot of beans at lunch. Are you telling me all this — uh, music — is a *placebo*?

  • Raffaele Del Vecchio

    so i have a big problem xD

  • Conscious Hunter

    fascinating. so what does this mean for the future of the age-old rhyme “beans, beans the magical fruit…”?


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