"Many people are familiar with acidophilus, one of the most well-known probiotics, and the “good bacteria” or “live bacteria” found in most yogurts. When you eat foods containing probiotics, or take probiotic supplements, the probiotics help to maintain a healthy intestinal tract, and can actually help prevent some illness, or fight off other illness and disease.
These probiotic bacteria are those that when present in sufficient quantities in your intestines, will kill off and prevent overgrowth of harmful bacteria — pathogenic bacteria — that can lead to digestive problems and disease. can overgrow and become established, causing digestive and other health problems."
Prebiotics and Probiotics - Wellness Awareness