Laughter triggers the release of a cocktail of chemicals and hormones that are extremely beneficial and crucial to good health. These substances can boost immune system function, improve your outlook on life, diminish symptoms of depression, reduce stress, and can help prevent diseases and disorders caused by chronic stress. (Kataria, Madan, MD. Dr. Kataria School of Laughter Yoga, Certified Laughter Yoga Leader Training Manual. India, 2010 revised edition.)
Refer to Blood Pressure, Calories, Cardiac, Digestion, Emotions/Feelings, Energy, Health, Immune System, Learning, Memory, Pain, Respiratory, etc., for additional information.