Table 3.

The beneficial and potential drawbacks of the normal enteric microbiota.

Positive Implications of Microbiota	Adverse Effects of Microbiota
Bacterial competition	Transformation of dietary procarcinogens into carcinogens
Enhancement of mucosal immunity and preservation of mucosal integrity	Intestinal dysbiosis disorders
Sustaining peristalsis and metabolism of dietary carcinogens	Opportunistic infection and gut-derived translocation
Production of vitamin K and B complex
Metabolism of prodrugs