Those extra pounds around your belly that no amount of exercise seems to shake off? That's not just fat; it's what scientists call white fat – unhealthy, energy-storing fat.
Brown fat, however, has been known to contain energy-burning, heat-producing qualities that could be key to helping people lose weight. The key is finding a way to increase brown fat in the body and reduce the white fat.
Hibernating mammals have brown fat, and human babies are born with it to help them keep warm outside the womb. Adults also have varying amounts of brown fat, but researchers weren't sure if it’s the same kind babies are born with, and if not, where it comes from.