Berk, L. S., &Tan, S. A. (2006). [beta]-Endorphin and HGH increase are associated with both the anticipation and experience of mirthful laughter. The FASEB Journal, 20(4), A382.
Chronic stress is correlated with increases in stress hormones such as cortisol and catecholamines. This can lead to suppression of immune components. We have previously reported that humor associated mirthful laughter (a eustress, positive phenomenon that ameliorates biological effects of distress): 1) decreases “detrimental” stress hormones; 2) increases NK cell activity and 3) increases IFN-. We have, also, reported that anticipation of a behavioral laughter ...