Spruiked by online influencers as a way of gaining insight into our health, experts say at-home tests oversimplify complex factors and can cause unnecessary distress

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For a few hundred dollars you can put your poo in an envelope and post it off to a laboratory. In return you’ll get a report (sometimes generated by AI) outlining your food sensitivities, metabolic fitness, and what pathogens or fungi you’re harbouring.

These at-home gut microbiome tests or “GI mapping” kits are frequently promoted by influencers as a way to “hack your health” and “take control” through analysing some of the trillions of organisms that live in your digestive tract.