Gut microbiome: Gas-sniffing smart pills to monitor gastrointestinal health pass first human trials

Checking up on the health of your gut and its resident microbes is soon to be as easy as swallowing a gas-sniffing capsule no bigger than a vitamin.

Previously trialled in pigs, the capsules — which transmit hydrogen, carbon dioxide and oxygen levels to a receiver as they traverse the digestive system — have successfully passed phase-one human trials.

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