In ancient China, emperors eagerly sought out a magical drink that would grant them eternal youth—and alchemists continued attempting to concoct this supposed miracle cure, commonly known as the "Elixir of Long Life," well into the 19th century. Sadly, it seems that no one has quite figured out a recipe for this fabled potion that truly does offer immortality. The good news? Doctors say there are plenty of drinks to sip on for longer life. Inevitably, when you meet a centenarian—...

Over the last few years, there's been a lot of buzz about probiotics, the so-called "good" bacteria that reside in the gut. They're believed to offer a wide range of health benefits, from a robust immune system to improved digestion. Not long after we started hearing about probiotics, prebiotics became a thing. Prebiotics are "most soluble fibers and resistant starches" that those good gut bacteria rely on for food, says Emilie Vandenberg, a registered dietitian at the Ohio State Universit...