The prebiotics and postbiotics are different that the probiotics. Probiotics require billions of bacteria to get through the harsh environment of the stomach down to the lower GI. Pre and post biotics are food for your existing gut bacteria. They make it more readily through the stomach than do probiotics. When you talk gut health, everyone always thinks probiotics. The truth is only a fraction of the money you spend on probiotics actually get down to your intestines (where they live). Probiotics are good. Pre and post biotics are different in that they feed the gut bacteria. Probiotics are trying to repopulate the healthy gut bacteria. One more thing to add. This product is unique from others “pink drink” in that it uses postbiotics. Post biotics are where all the exciting science and discoveries are. NS is positioning once again leading the pack with the latest technology.