Probiotics are live bacteria and yeasts that are good for your health, especially your digestive system. We usually think of bacteria as something that causes diseases. But your body is full of bacteria, both good and bad. Probiotics are often called "good" or "helpful" bacteria because they help keep our gut healthy. Good bacteria are naturally found in our body. We can find probiotics in some foods and supplements. It's only been si nce about the mid-1990s that people have wanted to know more about probiotics and their health benefits. Doctors often suggest them to help with digestive problems. And because of their newfound fame, you can find them in everything from yogurt to chocolate. How Do They Work? Researchers are trying to figure out exactly how probiotics work. Here are some of the ways they may keep you healthy: When we lose "good" bacteria in our body (like after you tak...