All nine people had high blood pressure -- which Dr. Oz, Vice-Chair and Professor of Surgery at Columbia University, says can strip a decade off your life span -- from years of eating unhealthy foods.
For the next 12 days, they lived in the zoo and kept to an "evolutionary" new diet -- the zookeeper fed them a diet reminiscent of an ape's. To get the calories they needed, each volunteer had to eat 11 pounds of raw fruits, vegetables and nuts every single day.
Can a human possibly lose weight eating 11 pounds of food a day?
These volunteers ate a lot of food. Yet after 12 days, their cholesterol dropped by an average of 25 percent, their blood pressure dropped by 10 percent, and they lost about 10 pounds each -- including two-and-a-quarter inches of their waists. "The results were ... remarkable," Dr. Oz says.
"When you eat this kind of food, you're sending a very clear message to your brain," Dr. Oz says. "You're taking calories and nutrients. What we normally do in America is we give calories to people without nutrition. ... The natural colors are gone, and so your brain sits back there and says, 'Am I still hungry or not?'"