Around six to nine months, breastfed and formula - fed infants will begin to develop their gastrointestinal track in a way that makes them ready to start some solid foods. (health-foundations.com)
This enzyme scavenges the sugar from small chemicals that the body sends to the gastrointestinal track for elimination. (sciencedaily.com)
One type of bacterium that does this lives in the gastrointestinal track. (sciencedaily.com)