A good sustained belly laugh results in a rise in endorphin production and a decrease in adrenaline and cortisol. (O’Brien, Mary, MD. Successful Aging. p 152-153. CA:Biomed General. 2007.)

Psychoneuroimmunology studies the interactions between the brain and the immune system (e.g., 60 minutes of watching a “Gallagher” comedic video caused reductions in the levels of: cortisol and catecholamines. (What’s so Funny and Why: Laughter and the Brain.)

Laughter has been shown to increase endorphin levels, stimulate immune function, reduce cortisol, stimulate circulation, massage internal organs, and have positive effects on the cardiovascular and respiratory systems. (Lubbe, Francois. UK Editor for The Healthier Life. Laughter has Potential Medical Benefits.)

Study of watching a 60-minute humorous video: Mirthful laughter experience appears to reduce serum levels of cortisol, dopac, epinephrine, and growth hormone. These biochemical changes have implications for the reversal of the neuroendocrine and classical stress hormone response. (Berk, L. S., PhD., et al. Neuroendocrine and stress hormone changes during mirthful laughter. Am J Med Science. Dec; 298(6):390-6, 1989.)

Study: Just the anticipation of mirthful laughter reduced the levels of three detrimental stress hormones. Cortisol (termed the steroid stress hormone), epinephrine (also known as adrenaline) and dopac, (the major catabolite of dopamine), were reduced 39, 70 and 38%, respectively (statistically significant compared to the control group). (Laughter Remains Good Medicine. 2009.)

Laughter reduces the level of stress hormones such as:

  • Cortisol : the primary hormone, increases sugars (glucose) in the blood stream
  • Ephinephrine (Adrenaline) : increases your heart rate, elevates your blood pressure and boosts energy supplies
  • Dopamin : is involved in the “fight or flight response” and associated with elevated blood pressure

(Ayasrah, Najla'a. Stress Relief By Laughter.)

Study of watching a 60-minute humorous video: Mirthful laughter experience appears to reduce serum levels of cortisol, dopac, and epinephrine. These biochemical changes have implications for the reversal of the neuroendocrine and classical stress hormone response. (Berk, L. S., PhD., et al. Neuroendocrine and stress hormone changes during mirthful laughter. Am J Med Science. Dec; 298(6):390-6, 1989.)

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