Walk into almost any grocery store and you’ll spot them on the shelves: tubs of kimchi, bottles of kombucha, jars of sauerkraut promising better digestion. Fermented foods have moved from niche health ...

Interest in gut health has driven a fermented foods list — yogurt, kimchi, kefir, sauerkraut and more — into mainstream diets, but not every product on store shelves delivers the same benefits. Here’s ...