People have been fermenting food for millennia. Here's why more people are focused on gut health now

Increased focus on gut health, driven by rising colorectal cancer rates and popularity of personalized microbiome treatments, has brought fermentation—a millennia-old food preservation method—into the spotlight. The U.S. dietary guidelines now encourage fermented foods, while the Make America Healthy Again movement promotes them, though experts caution that not all fermented products are equally beneficial.