An age-old technique transforms vegetables and spices into a popular condiment with a zesty, funky taste. The key? Nurturing the right community of microbes. Here's how the magic happens.
"It's a competitive environment that eventually favors what we want," Ujor says.
A few years ago, Sonnenburg's lab recruited healthy volunteers to eat a lot more live fermented foods than usual – an average of six servings a day of foods like kombucha, kefir, yogurt, kimchi, sauerkraut – and tracked differences in their stool."As they increased fermented foods in their diet, their gut microbiome diversity increased, which we tend to think of as a generally healthy outcome," says Sonnenburg.
"We need better studies that distinguish between fermented food types and quality," to understand what cancer risks might exist, Caffrey wrote in an email. Still, she adds, if something smells or tastes off to you, or looks like it's growing mold, don't eat it:"When in doubt, throw it out.
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