The American fermented foods market has officially surpassed $10 billion in annual sales, according to a new report from the Food Industry Association released on Tuesday. Kimchi, kombucha, kefir, and miso have led the surge, with combined growth of 28 percent year over year.

The report attributes the explosive growth to mounting scientific evidence supporting the role of fermented foods in gut microbiome health. Consumers aged 25 to 40 are the primary drivers, with 62 percent of millennials reporting that they actively seek out fermented products during grocery shopping trips.

Major food manufacturers are taking notice, with several announcing plans to launch fermented product lines this year. Industry analysts predict the market could reach $15 billion by 2028 as fermented ingredients increasingly appear in mainstream snacks, beverages, and condiments.