Successful agers typically have a sense of humor and a ready laugh. They are able to laugh at the little things. (O’Brien, Mary, MD. Successful Aging. CA: Biomed General. 2007, pp 152-153)

Studies by Berk of Loma Linda University: Beta-Endorphin and Human Growth Hormone increase are associated with both the anticipation and experience of mirthful laughter. Reported April 3, 2006. (Berk, Lee S. PhD. Paper presented in an American Physiological Society session at Experimental Biology, 2006. Article)

See the Brain and Laughter for additional information.