Polyphagia is excessive hunger or increased appetite. It is often associated with underlying health issues such as diabetes, hyperthyroidism (overactive thyroid), or certain psychological disorders.

Researchers identify “meal memory” neurons in laboratory rats that could explain why forgetting lunch leads to overeating. Scientists have discovered a specific group of brain cells that create ...

Obesity has many drivers, but for those with a particular rare metabolic disorder, the root cause is genetic. These patients develop ravenous hunger unsatisfied by any amount of food. The constant ...