We've all heard warnings, yet many of us keep gaining weight. More than half of American adults are overweight or obese, says the Centers for Disease Control and Prevention.

Most people who have metabolic syndrome have insulin resistance. This may be a beginning of the development of type 2 diabetes.

More than 19 million Americans have type 2 diabetes, and millions more have a condition that puts them at high risk for developing it.

A person with type 2 diabetes either can't make enough insulin or can't properly use it.

Sleep apnea is a breathing disorder in which a person experiences brief interruptions of breathing during sleep.

Gastroesophageal reflux is the return of acidic stomach juices, or food and fluids, back up into the esophagus.