A controversial new treatment rumored to have been performed on an NFL superstar is causing a stir in the medical community.
Indianapolis Colts quarterback Peyton Manning is out for at least two months after treatment for pain from a bulging disc in his neck.
After trying months of physical therapy and three surgeries, Manning recently made the decision to try an experimental treatment option.
He traveled to Europe for adult stem cell therapy before his latest surgery, according to a report aired Sunday by Fox Sports, who cited an unnamed source. The procedure has not yet been approved for use in the United States.
In this treatment, stem cells are taken from a healthy part of your body and injected into the area causing problems. It is hoped they can then repair the damaged cells.
"The stem cells very quickly affect the inflammation and then they're like a factory where they will regenerate right at the site," said Kevin Dunworth, founder and CEO of SpineSmith in Austin, Texas.
However, the treatment is not FDA approved and doctors say it's dangerous.
"When you leave a well-regulated environment, all bets are off," said Dr. Lawrence Goldstein, director of the University of California San Diego's stem cell program.
Doctors say that there is no proof that stem cell therapy works on this type of injury. They're concerned others will follow Manning's example and try the dangerous treatment.