Nothing makes good morning office chat like fiber talk. So the next time one of those great fiber-focused conversations comes up, here's somethingÂ to share.Â Scientists at the Medical College of Georgia have released the results to anÂ interesting study on how fiber works in a rather paradoxical way. As they explain,Â fiber actuallyÂ does its job by first doing damage to our gastrointestinal tract. As the fiber passes through, it tears cellsÂ along the way. These cells produce mucus, which is what helpsÂ foodÂ move more easily through the digestive process.Â The cycle of cell injury and repair produces more mucus and keeps the GI tract healthy.