Laughter and Play Activates Your Immune System and increasing your energy
for getting well!
The Science is in! What you always knew instinctively to be true - laughter
and play have been proven to be beneficial to your health.
During my 15 years experience developing and participating in conferences
based on the Healing Power of Laughter and Play I met two amazing
researchers, Dr. Lee S. Berk and Dr. Stanley Tan of Loma Linda University in
California. They have been studying the effects of laughter on the immune
system since 1984. To date their published studies have shown that laughter
boosts the immune system by:
- Lowering blood pressure.
- Reducing stress hormones.
- Raising levels of infection-fighting T-cells, disease-fighting proteins
called Gamma-interferon and B-cells, which produce disease-destroying
- Triggering the release of endorphins, the body's natural painkillers, and
producers of a general sense of well-being.
There have been numerous articles in scientific journals, newspapers and
magazines about their ground-breaking research. I will be including some of
those articles here on this site, as well as links to other sites that I
think you may find of interest.
HAPPINESS HEALS! It is a scientific fact. I think it is important to
include some of these important studies to help you strengthen your belief
that when you are engaged in or merely thinking about things that bring you
joy, you are igniting your natural healing systems!
Loma Linda University School of Medicine news ?March 11, 1999
Laughter research conducted at LLUMC
Although you may never see him sporting a red clown nose, big shoes, or
wearing a bedpan on his head, Lee Berk, DrPH, MPH, believes in using
laughter to help sick people feel better.
In fact, just like his real-life friend, Hunter "Patch" Adams, MD (portrayed
in the recent hit movie of the same name by Robin Williams), Dr.
Berk--associate director for the Center for Neuroimmunology, assistant
research professor in the Loma Linda University School of Medicine, and
assistant clinical professor of health promotion and education in the School
of Public Health--believes that because a patient is more than just a
disease, it's important to look at the whole person when providing medical
But you won't find Dr. Berk performing a comedy routine for patients like
Dr. Adams does. Instead, he's the man behind the scenes, conducting the
research that proves to nay-sayers what others have only theorized: that
laughter does indeed lower stress hormones and give the immune system a
Dr. Berk's research into laughter's benefits began in the late 1970s, when
his studies on exercise showed that it not only boosted the immune system,
it also decreased stress hormones in the body.
These findings led Dr. Berk and his colleague Stanley Tan, MD, assistant
professor of medicine at Loma Linda University, to look for something
else--something universal--that might also have the same effect. They hit
upon mirthful laughter as a possibility.
They extended a research invitation to William Fry, MD, then a psychiatrist
at Stanford University, who had researched changes in blood pressure and
heart rate related to laughter.
"Having the new tools in medicine to look at some of these stress hormones,
we said [to Dr. Fry], 'Fly down, bring your Laurel and Hardy tapes, let's
sit down, we'll place an IV in your arm and we'll draw continuous blood
samples while you're watching the tapes,'" Dr. Berk says.
Dr. Fry accepted the invitation.
"That was the initiation of everything," Dr. Berk adds. "We looked at the
data and we fell on the floor. It was mind-blowing."
Since that time Drs. Berk and Tan have conducted controlled scientific
experiments that have proven those early results.
- They found first of all that laughter increases the immune system's
activity. Here's how it works:
- Natural killer cells (the cells that attack virus and tumor cells)
increase in number and activity.
- More T cells (which wait to be told to do something) are activated than
- The antibody immunoglobulin A (which protects the upper respiratory
- Gamma interferon increases. This cytokine tells different components of
the immune system to turn on.
- Immunoglobulin G (the immunoglobulin produced in the greatest quantity)
and Complement 3 (which helps antibodies pierce dysfunctional or infected
cells) increase both during laughter and the next day.
The research also showed that in general, stress hormones--which actually
constrict blood vessels and suppress immune activity--decrease in the body
as a result of laughter.
Dr. Berk's research has fit in perfectly with the
Loma Linda University and Medical Center motto, 'To make man whole.', "After
all, as stated in Proverbs 17:22, 'A merry heart is like a good medicine,'"
says Dr. Berk.
Many programs--including several for cancer patients--have
resulted from his findings on laughter's benefits:
The Laughter Library is
one such example. Early last year, the Loma Linda University Cancer
Institute began stocking humor materials that patients can check out.
says Jann Cady Marks, RN, MBA, executive director of the Institute, the
library exists in three locations for patients' convenience: the ninth floor
of the Medical Center, the outpatient medical oncology area (where patients
come for chemotherapy treatments), and at the Cancer Resource
Patient TV. According to Janis Tucker, RN, media specialist,
audiovisual communications has begun offering more comical programming on
the patient television stations within the hospital as a result of Dr.
SMILE. Dr. Berk collaborated with Barry Bittman, MD, to
develop a humor profile called SMILE (Subjective Multidimensional
Interactive Laughter Evaluation), which is based on the idea that each
person has a different humor preference. SMILE participants answer a few
easy questions about how they're feeling and what types of humor they enjoy,
and then receive what Dr. Berk calls a 'humor prescription'--a detailed list
of suggested reading materials, videotapes, and audiotapes that the person
Even though it's located at the Cancer Resource Center, SMILE
isn't just for cancer patients. Sheryl McWilliams, RN, director of the
Center, encourages anyone who's interested in learning more about their
humor preferences to come take the free, 10-minute computer questionnaire.
"[We even] help people learn how to use the program if they're not
familiar with computers," Ms. McWilliams says.
The future of mind-body
research is bright, according to Dr. Berk. As associate director of the
School of Medicine's Center for Neuroimmunology, which opened in 1998, he
plans to continue his current studies into the effects of exercise,
nutrition, and music on the immune system, and how humor affects pain
tolerance and the need for pain medication.
"We're more aware that there is
a significant relationship between the mind and the body," Dr. Berk says.
"Now medical science is starting to recognize with substantial scientific
support what we as an institution were well aware of many years ago--the
true right and benefit of whole-person care."
"Erin Sommerville brings magic to science as one of the true pioneers in the
field of Mind/Body medicine. As a teacher to Health Care Professionals
worldwide and as a brilliant clinician, her mastery lies in the often
invisible link in the Biology of emotions to the visible link of well-being
and health that can be achieved with focused intention".
Janet Hranicky, PhD.
American Health Institute