Research has shown that the health benefits of laughter are far-ranging. While more studies need to be done, studies so far have shown that laughter can help relieve pain, bring greater happiness, and even increase immunity.
Laughter reduces the level of stress hormones like cortisol , epinephrine (adrenaline), dopamine and growth hormone. It also increases the level of health-enhancing hormones like endorphins, and neurotransmitters. Laughter increases the number of antibody-producing cells and enhances the effectiveness of T cells. All this means a stronger immune system, as well as fewer physical effects of stress.