This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page. Embed Code Restart Playing WATCH MORE VIDEOS FROM THIS EPISODE > Osmotic diarrhea occurs when the body is unable to absorb a nutrient, such as lactose or fructose, and it draws excess water into the bowels, like a sponge, resulting in loose stool. ShareTweet