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An Introduction to Reiki
Reiki (pronounced "ray-kee") is an energy medicine practice that originated in
Japan. In Reiki, the practitioner places his hands on or near the person receiving
treatment, with the intent to transmit ki, believed to be a life-force energy.
Practitioners also believe that they can treat themselves with Reiki and send ki
across short or long distances. In the United States, Reiki is part of
complementary and alternative medicine (CAM). This Backgrounder provides a
general overview of Reiki and suggests some resources you can use to learn
more about this practice.
Key Points
• People give and receive Reiki for various health purposes.
• It is not fully known whether Reiki influences health and how it might do
so. The existence of ki has not been proven scientifically.
• The National Center for Complementary and Alternative Medicine (NCCAM)
is sponsoring studies to find out more about Reiki's effects, how it works,
and diseases and conditions for which it may be most helpful.
• Tell your health care providers about any complementary and alternative
practices you use. Give them a full picture of what you do to manage your
health. This will help ensure coordinated and safe care.
Reiki as an Energy Medicine Therapy
The word Reiki is made up of two Japanese words: Rei, or universal spirit
(sometimes thought of as a supreme being), and ki.
Thus, the word Reiki means "universal life energy."
In CAM, Reiki belongs to a domain (area of knowledge) called energy medicine.
In this domain, therapies are based on the belief that disturbances in energy
cause illness. Energy medicine practitioners seek to improve the flow and
balance of energy in a beneficial way.
About Energy Medicine
Energy medicine seeks to use, for potential health purposes, forces of two types:
• Forces that scientific instruments can measure (for example, forces associated with
electromagnetic fields).
• Forces (called biofields or putative energy fields) that some people believe surround and
penetrate the human body, but whose existence is not yet scientifically proven. Ki, the lifeforce
energy described in Reiki, is in this second category.
Researchers have been interested in detecting and describing the physical properties of
biofields.∗Some, using certain sophisticated tools, have claimed to detect or photograph
differences in study participants before and after energy treatments. However, it is not clear
what is being detected or photographed. Others have claimed to detect energy interactions
between healers and people they treat. However, these findings have not been validated, and
the exact nature of the energies is not clear.
A Description of Reiki
Reiki is a therapy that the practitioner delivers through the hands, with intent to raise the
amount of ki in and around the client, heal pathways for ki, and reduce negative energies.
Reiki can be practiced in several ways: on its own, along with other CAM therapies, and along
with conventional medical treatments.
When a practitioner performs Reiki, usually the client sits or lies comfortably, fully clothed.
The practitioner places her hands on or slightly above the client's body, using 12 to 15 different
hand positions, with the intent to transmit ki. The hands are positioned with the palms down,
fingers and thumbs extended. Each hand position is held until the practitioner feels that the
flow of energy has slowed or stopped, typically about 2 to 5 minutes. Some Reiki practitioners
believe they are helped by "spirit guides" for proper flow of the energy.
Practitioners perform Reiki most often in offices, hospitals, clinics, and private homes. The
practitioner and client determine the number of sessions together. Typically, the practitioner
delivers at least four sessions of 30 to 90 minutes each.
Depending on their level of training, people can perform Reiki on themselves as well as on
people who are either close by or at some distance away (even at a long distance). In the latter
case, Reiki is a type of "distant healing."
More About Ki
People who believe in the existence of ki hold that ki:
• Is spiritual in origin
• Makes up and moves through all living things
∗For more on this topic, see NCCAM's Backgrounder "Energy Medicine: An Overview."
• Is available in infinite quantities, positive in nature, and important to all aspects of health
• Is present both inside the body and on its surface
• Flows throughout the body in specific channels
• Has its flow disturbed by negative thoughts or feelings
They also believe that if ki's flow is disrupted, the body's functioning becomes disrupted, and
health problems can occur. The concept that sickness and disease arise from imbalances in a
vital energy field is the foundation not only of Reiki but of some other CAM therapies, such as
traditional Chinese medicine (in which the energy is called qi or chi) and homeopathy (vital force).
Use for Health Purposes
People have sought Reiki treatment for a wide variety of health-related purposes. Some
examples include:
• Effects of stress
• Chronic pain
• Recovery from surgery and anesthesia
• Side effects of chemotherapy and radiation therapy for cancer
• Lowering heart rate
• Improving immunity
• Mental clarity
• Sense of well-being and/or spirituality
• Enhancing the sense of peace in people who are dying
A recent national survey on Americans' use of CAM found that 1.1 percent of the 31,000
participants had used Reiki in the year before the survey.
Effects of Reiki
Clients may report a deep feeling of relaxation after a Reiki session. Relaxation in and of itself
may have beneficial health-related effects, such as reducing pain, nausea, and fatigue. A client
might also experience warmth, tingling, sleepiness, refreshment, and/or the easing of one or
more other symptoms after treatment.
Reiki appears to be generally safe, and serious side effects have not been reported. Some
practitioners advise caution about using Reiki in people with psychiatric problems.
Sometimes a Reiki client experiences what practitioners call a "cleansing crisis." The person
may have symptoms such as a feeling of weakness or tiredness, a headache, or a stomach
ache. Reiki practitioners believe that these are effects of the body releasing toxins. They advise
the client on how to deal with such symptoms if they occur, such as by getting more rest,
drinking plenty of water, or eating a lighter diet.
Some Other Points To Consider About Reiki as CAM
If you are considering or using Reiki as CAM:
• Do not use Reiki as a replacement for conventional care or to delay the time it takes you to
see a doctor about a medical problem.
• Tell your health care providers about any complementary and alternative practices you
use. Give them a full picture of what you do to manage your health. This will help ensure
coordinated and safe care.
• Ask the Reiki practitioner about his training and experience (see also the NCCAM
publication "Selecting a CAM Practitioner"). Ask about any costs as well, for these can vary
from fees to donations to no charge.
• Reiki has not been well studied scientifically, but you can find and read research studies
published on its use for various health conditions.
History of Reiki
There are different beliefs about the origin of Reiki—one is that it is based on Tibetan sutras
(texts of Buddhism) written by monks. Sources agree that in the mid-19th century, Dr. Mikao
Usui, a Japanese physician and monk, developed this healing approach and spiritual path,
named it Reiki, trained others in it, and developed an organization.
One of Dr. Usui's students further developed these teachings and opened his own clinic in
Tokyo, where, in 1936, an American named Hawayo Takata went for treatment. Later, she
trained in Reiki, became a Master, and is credited with introducing Reiki to the West in the late 1930s.
Training, Licensing, and Certification
A person does not need a special background or credentials to receive Reiki training. Many
who seek the training are health care professionals. Students must learn the practice from an
experienced Reiki teacher or Master, as it is not a therapy that can be self-taught.
There are a number of different schools of Reiki. Usually there are three or four levels (or
degrees) of expertise, depending upon the school or type. Each level begins with an
attunement, or initiation into that level. Receiving an attunement is believed to bring the
ability to access Reiki energy and to open what is conceived as a central core of energy in the body.
Training for each level typically takes 1 or 2 days. The techniques taught can vary greatly
between Reiki schools and teachers. In time, some students undertake the effort to become a
Reiki Master, which enables one to teach Reiki and perform attunements. This process can
take years. Some members of the Reiki professional community are interested in developing
additional, voluntary standards for their profession.
The laws regulating the practice of Reiki vary from state to state, and sometimes by local areas
as well. For example, in Florida, a Reiki practitioner must also be a certified massage therapist.
Most other states do not consider Reiki to be massage and thus do not regulate it as a form of
massage therapy.
Some Points of Controversy
As in other CAM therapies, there are areas of controversy in Reiki. For example:
• Since little is known scientifically about Reiki, accepting its teachings about its healing
properties and about ki is a matter of faith.
• Some people believe that effects attributed to Reiki occur for psychological reasons (such as
the placebo effect or suggestibility), or that there are no true effects.
• Some people feel Reiki is incompatible with their religious or spiritual beliefs.
• Government licensing and regulation of Reiki practice is a controversial area.
NCCAM-Funded Research
Some recent NCCAM-supported studies have been investigating:
• How Reiki might work
• Whether Reiki is effective and safe for treating the symptoms of fibromyalgia
• Reiki's possible impact on the well-being and quality of life in people with advanced AIDS
• The effects of Reiki on disease progression and/or anxiety in people with prostate cancer
• Whether Reiki can help control blood sugar levels or improve heart function in people who
have nerve pain from diabetes
References
Sources are drawn primarily from recent reviews in English on Reiki in the PubMed database,
selected evidence-based databases, and Federal sources.
Barnes PM, Powell-Griner E, McFann K, Nahin RL. Complementary and alternative medicine use among adults: United
States, 2002. CDC Advance Report #343. 2004.
Chu DA. Tai chi, qi gong and Reiki. Physical Medicine and Rehabilitation Clinics of North America. 2004;15(4):773-781.
DiNucci EM. Energy healing: a complementary treatment for orthopaedic and other conditions. Orthopaedic Nursing.
2005;24(4):259-269.
Engebretson J, Wardell DW. Experience of a Reiki session. Alternative Therapies in Health and Medicine. 2002;8(2):
48-53.
Healing touch: hands-on help for the heart? Touch therapies are reaching growing numbers of patients. Harvard Heart
Letter. 2005;16(2):3.
International Association of Reiki Professionals Web site. Accessed at http://www.iarp.org on March 30, 2006.
LaTorre MA. The use of Reiki in psychotherapy. Perspectives in Psychiatric Care. 2005;41(4):184-187.
Miles P, True G. Reiki—review of a biofield therapy history, theory, practice, and research. Alternative Therapies in Health
and Medicine. 2003;9(2):62-72.
NCCAM-6
National Center for Complementary and Alternative Medicine. Energy Medicine: An Overview. National Center for
Complementary and Alternative Medicine Web site. Accessed at
http://nccam.nih.gov/health/backgrounds/energymed.htm on March 30, 2006.
National Center for Complementary and Alternative Medicine. Expanding Horizons of Health Care: Strategic Plan
2005-2009. Bethesda, MD: National Institutes of Health; 2005. NIH publication no. 04-5568.
Nield-Anderson L, Ameling A. Reiki: a complementary therapy for nursing practice. Journal of Psychosocial Nursing and
Mental Health Services. 2001; 39(4):42-49.
Reiki. Natural Standard Database Web site. Accessed at http://www.naturalstandard.com on March 30, 2006.
For More Information
NCCAM Clearinghouse
The NCCAM Clearinghouse provides information on CAM and NCCAM, including publications
and searches of Federal databases of scientific and medical literature. The Clearinghouse does
not provide medical advice, treatment recommendations, or referrals to practitioners.
Toll-free in the U.S.: 1-888-644-6226
TTY (for deaf and hard-of-hearing callers): 1-866-464-3615
Web site: nccam.nih.gov
E-mail: info@nccam.nih.gov
PubMed®
A service of the National Library of Medicine (NLM), PubMed contains publication information
and (in most cases) brief summaries of articles from scientific and medical journals. CAM on
PubMed, developed jointly by NCCAM and NLM, is a subset of the PubMed system and focuses
on the topic of CAM.
Web site: www.ncbi.nlm.nih.gov/sites/entrez
CAM on PubMed: nccam.nih.gov/camonpubmed/
CRISP (Computer Retrieval of Information on Scientific Projects)
CRISP is a database of information on federally funded scientific and medical research projects
being conducted at research institutions.
Web site: www.crisp.cit.nih.gov
ClinicalTrials.gov
ClinicalTrials.gov is a database of information on federally and privately supported clinical
trials (research studies in people) for a wide range of diseases and conditions. It is sponsored
by the National Institutes of Health and the U.S. Food and Drug Administration.
Web site: www.clinicaltrials.gov
Created April 2006 D315
Updated June 2007
Acknowledgments
NCCAM thanks the following people for their technical expertise and review of this
publication: Joan Fox, Ph.D., and Didier Allexandre, Ph.D., The Cleveland Clinic; Karen
Prestwood, M.D., University of Connecticut Health Center; Gala True, Ph.D., Albert Einstein
Healthcare Network; and Morgan Jackson, M.D., and Shan Wong, Ph.D., NCCAM.
This publication is not copyrighted and is in the public domain.
Duplication is encouraged.
NCCAM has provided this material for your information. It is not intended to substitute
for the medical expertise and advice of your primary health care provider. We encourage
you to discuss any decisions about treatment or care with your health care provider. The
mention of any product, service, or therapy is not an endorsement by NCCAM.
National Institutes of Health
♦♦♦
U.S. Department of Health and Human Services
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