According to the Food and Agricultural Organization and WHO, probiotics are "Live microorganisms which, when administered in adequate amounts,confer a health benefit on the host".
There are about 400 types of probiotic bacteria in a normal human digestive tract alone. These bacteria play a vital role in keeping us healthy. The largest group of probiotic bacteria found in our body is Lactic Acid Bacteria, the same bacteria also found in yogurt.
Experiments into the benefits of probiotic suggest a range of beneficial uses. Much of our understanding on the benefits of probiotics, however, is still in the experimental stage.
Probiotics are found to be especially beneficial during a course of antibiotics, as probiotics adds good bacteria that have been reduced by the intake of medication.
Probiotics are considered safe and probiotic dietary supplements are regulated by the U.S. Food and Drug Administration (FDA). Probiotics' side effects, if any, tend to be mild and digestive.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.