The delicate intestine environment typically contains healthy amounts of good bacteria. However, these bacteria are destroyed by infections, disease, poor diet, antibiotics and stress. Supplementation and proper delivery of live organisms to the intestinal tract replaces valuable organisms lost. The good news for probiotics is, unlike many other dietary supplements, studies consistently show that even huge doses of natural probiotic organisms cause no ill effects for the vast majority of consumers. The only challenge is to find probiotic supplements that truly "deliver the goods".