Laughter has physiological effects on the body; it changes brain function and body chemistry. Some examples of the changes are:
Laughter also has the following effects on specific illnesses.
 Bennett MP, Lengacher C. Humor and Laughter May Influence Health IV. Humor and Immune Function. Evid Based Complement Alternat Med. 2009;6(2):159-164.
 Mora-Ripoll R. The therapeutic value of laughter in medicine. Altern Ther Health Med. 2010;16(6):56-64.
 Hayashi K, Hayashi T, Iwanaga S, et al. Laughter lowered the increase in postprandial blood glucose. Diabetes care. 2003;26(5):1651-1652.