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It always surprises me how much the emerging science of studying our gut bacteria has captured the public interest.

It sometimes feels like the microbiome has been claimed to be a cause of almost every disease you can think of, from cancer , to obesity, to depression. New Feature

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One of the more attention-grabbing theories is that gut bacteria could be involved in autism , when people have problems with communication and social interactions.

The theory has had widespread media coverage, includ

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