Imagine checking into a gorgeous retreat and coming home a few days later with a whole new gut. At least, that’s the idea behind a growing crop of gut-health getaways, where specialized menus, wellness routines and even microbiome testing promise to help travelers get their digestive health on track. It sounds pretty great, especially if your gut hasn’t exactly been your best friend lately. But before you book a flight in the name of better digestion, there’s one big question: Can you actually “reset” your gut in a week? How Quickly Can Your Gut Microbiome Change? Faster th...