Expectation of Laughter Boosts Endorphines and Human Growth Hormones

“Laughter diminishes the secretion of cortisol and epinephrine, while enhancing immune reactivity. In addition, laughter boosts secretion of growth hormone, an enhancer of these same key immune responses. The physiological effects of a single 1-hour session viewing a humorous video has appeared to last up to 12-24 hours in some individuals.”

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