Then greenish brown bile produced in the liver is added to help the breakdown of these fats. By the time the food leaves your stomach and passes into the small intestine, it's unrecognizable. The walls of our intestines absorb the nutrients into our blood and that's how we get the energy we all need to live.
How long does this vital process take? It depends on what you're eating, Dr. Oz, Vice-Chair and Professor of Surgery at Columbia University, says. "A steak dinner can take you two, maybe three days to get out of your intestine. What that means is the way you digest it is basically to rot it in your intestines. On the other hand, if you eat vegetables and fruits, they're out of your system in less than 12 hours."
What about chewing gum? Is it true that it takes seven years for it to digest? "No," Dr. Oz says. However, this little urban legend can be a good way to "get kids to stop chewing gum."