Here are a few quotes from the book. Make of it what you will.
In Dr. Pimentel's back cover of his book. It reads, "Dr. Pimentel believes that the "missing link" or root cause of most IBS symptoms can be attributed to an overgrowth of bacteria in the small intestine."
"The final, most recent theory defines IBS as a bacterial disease."
"Admidst all this confusion about defining IBS, and now with the association with bacterial overgrowth, I have had numerous patients ask me, "What should I call my condition? Do I have IBS or am I just suffering from bacterial overgrowth? I explain that it doesn't really matter what the label is. What matters is that identification of a treatable condition associtated with IBS provides a way to treat their condition and give them the lasting relief they desire."