There are more bacteria in the digestive system than there are cells in the body some one hundred trillion. We are not always aware of the role the friendly bacteria play. Their major role is in balancing and counteracting the unfriendly bacteria. When friendly bacteria are not at appropriate levels, and when unfriendly bacteria dominate, health problems can result. These include gas, bloating, intestinal toxicity, constipation, and malabsorption of nutrients.
Friendly bacteria do much more than counter the unfriendly bacteria.
They also provide us with other, powerful benefits. Lactobacilli are one of the most important types of friendly bacteria found in the digestive tract. They play a key role in producing fermented milk, yogurt, and cheeses. His investigation of this led him to diet, yogurt, and lactobacilli. His work was the first to prove that lactobacilli could transform milk sugar into lactic acid.