Probiotics, Flora, what are they? If you go to Webster’s Dictionary, the word Probiotic means “For Life.” Most Americans are unfamiliar with this supplement, however on the other hand almost everyone knows of its opposite, “Anti-Biotic,” Against Life. Did you know that your body was designed to have about three pounds of “friendly bacteria” in your intestines at all times? Probiotics are the good beneficial bacteria that compose and make up your intestinal wall called the mucosa membrane or mucosa lining. We need this protective shield to defend us from the onslaught of bad bacteria, undigested foods and stomach acids. These “friendly bacteria,” known as flora, live to control the over 400 harmful bacteria that bombard your body. It’s commonly referred to as your “second immune system.”