Newborn stomach to the earliest presence of bacteria can produce oligosaccharides, probiotic.
At birth the human gastrointestinal tract is not originally bacteria, but in 5-6 days after birth, starting from the environment "get" some bacteria, wherein the child before the age of one major lactic acid bacteria is known, coli after one year old man slowly transformed into large groups gastrointestinal bacterial ecology (E. coli is the most).
These bacteria in the process of evolution, we incorporated the gastrointestinal tract, and the body form a "symbiotic" state, in addition to the human body required for the synthesis of vitamin K and B-complex, the main function of these bacteria is the formation of an ecological balance, inhibit the growth of other harmful bacteria.
coli or other probiotics are good bacteria in our bodies already exist, more than enough good bacteria will reduce bad bacteria, so the child will be able to reduce constipation, diarrhea, or the chance of colorectal cancer.