Disclosed in an embodiment herein is a method of treating symptoms of Clostridium difficile in a subject in need, including administering an effective amount of hydroxyproline, or derivative thereof, to the subject, wherein said hydroxyproline, or derivative thereof, inhibits growth or proliferation of Clostridium difficile, or inhibits production of toxins or neutralizes toxins of the bacterium Clostridium difficile.
