Finding the right energy bar can sometimes be an arduous process filled with Internet research, nutrition label reading, and frustration. With many bars on the market today containing processed ingredients, large amounts of sugars, and empty calories, it can be hard to decipher which bars are actually nutritious and which ones are pretty much masquerading as candy. If you’re looking for a bar that will be gentle and beneficial to your stomach, it’s a good idea to look for a bar that contains prebiotics, probiotics, or both.

While similar in name, prebiotics and probiotics are not the same. Probiotics are live bacteria strains that are considered “good” and help your stomach break down food, settle minor digestive issues, and help defeat harmful bacterial microbes. Prebiotics, on the other hand, are specialized plant fibers that beneficially nourish the good bacteria already in the large bowel or colon. To put it simply: probiotics introduce good bacteria into the gut, prebiotics act as a fertilizer for the good bacteria that’s already there.  Here are 10 energy bars available online that contain prebiotics, probiotics, or both!