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Influencers across social media encourage people to try unproven "gut hacks."
Researchers say probiotic yogurt can help improve gut health and weight loss.
A mummified body — dubbed Ötzi the Iceman — was found by German tourist Helmut Simon on a glacier in the Tirolean Ötztal Alps in 1991.
Weight loss and diabetes drugs target regulatory pathways involved in metabolism that the microbes in your gut and certain molecules from food already play a key role in regulating.