This document discusses bacteria and fermentation. It provides information on:
1. Bacteria play important roles in both causing disease and supporting health, such as aiding digestion. The human body contains trillions of bacterial cells.
2. Fermentation is used to preserve foods through pickling, make alcoholic beverages and cheeses, and decompose organic wastes. It creates healthy bacteria and nutrients in fermented foods.
3. Maintaining a balance of good bacteria in the gut is important for immunity and health, but many factors disrupt this balance. Fermented foods can help restore healthy gut bacteria.