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Kimchi is a fermented dish that traditionally comes from Korea and recently it’s grown in popularity as a buzzy-worthy superfood. “Studies have shown that fermented foods improve the microbiome—meaning a healthier gut by providing the body more of the good bacteria—which supports digestion and immune function,” says Dickson. “Sauerkraut is less expensive and an easy addition to sandwiches, quesadillas, and even casserole.”