Laughter Doses:Healing For the Soul. If an apple a day keeps the doctor away,what then will a good laugh do? It has been shown to reduce cancer,lower blood pressure,reduce stress hormones and boost immune system. Norman Cousin s in 'Anatomy of an illness' accounts how he overcame major illness through laughter by arranging comedy video for genuine belly laughter which heals him. It stimulate the production of endorphines the body natural pain killer. Enjoy intense laughing dose daily,share smile,stay happy.