Apples Contain About 100 Million Bacteria: Study

New Delhi: An Apple a day keeps the doctor away is a popular saying but a recent study seems to prove otherwise. Besides containing fibre and vitamins, an apple also carries about 100 million bacteria, and whether these microbes are good or bad for health may depend on how the fruit was grown, according to a study.

The study, published in the journal Frontiers in Microbiology, shows that organic apples harbour a more diverse and balanced bacterial community, which could make them healthier and tastier than conventional apples, as well as better for the environment.

“The bacteria, fungi, and viruses in our food transiently colonise our gut,” said Professor Gabriele Berg, of Graz University of Technology, Austria.

“Cooking kills most of these, so raw fruit and veg are particularly important sources of gut microbes,” Berg said.

The researchers compared the bacteria in conventional store-bought apples with those in visually matched fresh organic ones.

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Stem, peel, flesh, seeds, and calyx- the straggly bit at the bottom where the flower used to be- were analysed separately.

Overall, organic and conventional apples were occupied by similar numbers of bacteria.

“Putting together the averages for each apple component, we estimate a typical 240-gram apple contains roughly 100 million bacteria,” said Berg.

The majority of the bacteria are in the seeds, with the flesh accounting for most of the remainder. So, if the core is discarded, the intake falls to nearly 10 million, researchers said.

“Freshly harvested, organically managed apples harbour a significantly more diverse, more even and distinct bacterial community, compared to conventional ones,” said Berg.

Specific groups of bacteria known for health-affecting potential also weighed in favour of organic apples.

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