By now, you’ve heard of probiotics, the “good” bacteria that live in your gut and help the “bad” guys from taking over. Research suggests probiotics could help you lose weight, clear up your skin, improve your mood, and even help you fight disease.
But just as you want to eat probiotics to reap their benefits—the good-for-you bacteria is in Greek yogurt and fermented foods such as kefir and sauerkraut—probiotics (which, BTW, are live organisms) have to eat, too. Seriously.
“Prebiotics can be thought of as the food for probiotics,” says Melissa Majumdar, R.D., a senior bariatric dietitian at Brigham and Women’s Center for Metabolic and Bariatric Surgery in Boston, MA.