1For many years, there has been a section in Reader's Digest magazine called "Laughter, the Best Medicine." 2The name is not such an exaggeration—medical studies show that laughter is good for one's physical and emotional health.3Ahearty laugh exercises the internal organs, including the heart and lungs. 4The deep breathing that accompanies laughter supplies your body with extra oxygen. 5Many diseases deplete the body's supply of oxygen, so getting extra oxygen is important. 6Laughter may also stimulate the body's production of endorphins, which act as painkillers and antidepressants.