National Center for Complementary and Integrative Health (NCCIH)

NIH…Turning Discovery Into Health

Follow NCCIH Subscribe to our email update Subscribe to the NCCIH RSS feed Follow NCCIH on FacebookRead our disclaimer about external links Follow NCCIH on TwitterRead our disclaimer about external links


Irritable Bowel Syndrome and Complementary Health Approaches

On this page:

As many as one in five Americans have symptoms of irritable bowel syndrome (IBS). Many people with IBS turn to complementary health approaches to help relieve their symptoms. This fact sheet provides basic information on IBS and what the science says about complementary products and therapies for this condition. If you are considering any of these approaches, this information can help you talk to your health care provider.


Key Points

  • No complementary health approach has been definitely shown to be helpful for IBS.
  • Dietary supplements, including those used for IBS, can cause medical problems if not used correctly, and some may interact with prescription or nonprescription medicines or other dietary supplements.
  • Tell all your health care providers about any complementary health approaches you use. Give them a full picture of what you do to manage your health. This will help ensure coordinated and safe care.


About Irritable Bowel Syndrome

IBS is a chronic disorder that interferes with the normal functions of the colon. IBS is characterized by symptoms such as abdominal pain, cramping, bloating, constipation, and diarrhea. IBS often starts between the ages of 20 and 30, but children can also experience symptoms. IBS is twice as common in women as it is in men and can be disabling and seriously affect a person’s quality of life physically, psychologically, socially, and economically. A person with IBS may have other, co-existing chronic pain conditions. Such conditions can include chronic fatigue syndrome, endometriosis, fibromyalgia, interstitial cystitis (painful bladder syndrome), temporomandibular joint dysfunction, and vulvodynia (chronic vulvar pain). It is not known whether these disorders share a common cause. IBS may also exist with psychiatric conditions such as anxiety and depression.

Researchers have not yet discovered a specific cause of IBS. IBS is often considered a functional disorder. For example, one theory is that the muscles and nerves in the bowel are extra sensitive in people with IBS—muscles may contract too much during or shortly after a meal, or nerves may react when the bowel stretches, causing cramping, diarrhea, or pain. A previous infection in the gastrointestinal tract or an imbalance in serotonin are also possible causes of IBS. Stress, large meals, medicines, certain foods, and alcohol may also be triggers for IBS symptoms.

There is no known cure for IBS, but there are options that can be helpful in controlling the symptoms. Treatments may include:

  • Dietary changes (eating smaller meals, avoiding foods that tend to trigger IBS symptoms)
  • Medicine (antispasmodics, antidepressants, diarrhea and constipation treatments, and over-the-counter medications such as fiber supplements and laxatives)
  • Stress management (including cognitive behavioral therapy, counseling and support, regular exercise, lifestyle changes, and adequate sleep).

Although IBS can be painful, it does not damage the colon or other parts of the digestive system, and it has not been shown to lead to other serious gastrointestinal diseases. Symptoms of IBS are similar to those of other intestinal disorders such as Crohn’s disease and ulcerative colitis; however, they are not related.


Complementary Health Approaches for IBS

People with IBS can often control their symptoms by diet, medication, or stress management. However, many people find that their symptoms persist despite these treatments, or the medications they take may cause adverse effects or even worsen symptoms. They may therefore be interested in complementary health approaches such as:

  • Acupuncture
  • Herbal remedies
  • Hypnotherapy
  • Meditation
  • Peppermint oil
  • Probiotics
  • Reflexology
  • Relaxation therapies
  • Yoga.

About Scientific Evidence on Complementary Health Approaches

Scientific evidence on complementary health approaches includes results from laboratory research (e.g., animal studies) as well as clinical trials (studies in people). It provides information on whether an approach is helpful and safe. Scientific journals publish study results, as well as review articles that evaluate the evidence as it accumulates; fact sheets from the National Center for Complementary and Integrative Health (NCCIH)—like this one—base information about research findings primarily on the most rigorous review articles, known as systematic reviews and meta-analyses.


What the Science Says

IBS is challenging to study because its symptoms vary, are non-specific, can be episodic, may resolve for long periods, and there are no definitive diagnostic tests.

This section summarizes research on some of the most popular complementary health approaches for IBS. Overall, although there is some emerging evidence suggesting that some of these approaches may be helpful for IBS, there have been few large well-designed studies, and most of the studies have had methodological flaws.

  • Hypnotherapy (hypnosis), which involves the power of suggestion by a trained hypnotist or hypnotherapist during a state of deep relaxation, is the most widely used mind and body intervention for IBS. Gut-directed hypnotherapy—a specialized form of hypnosis that uses hypnotic induction with progressive relaxation and other techniques, followed by imagery directed toward the gut—is also popular. According to multiple systematic reviews of the research literature, hypnotherapy may be a helpful treatment for managing IBS symptoms. Several studies of hypnotherapy for IBS have shown substantial long-term improvement of gastrointestinal symptoms as well as anxiety, depression, disability, and quality of life.
  • Herbal remedies are commonly used for IBS symptoms. Much of the research on these remedies has been done in China. A systematic review of clinical trials for 71 herbal remedies found limited evidence suggesting that a few of these herbal remedies might help improve IBS symptoms including abdominal pain, constipation, and diarrhea. However, the review emphasizes that the studies were generally of poor quality.
  • Peppermint oil is often used to treat IBS. Results from studies are mixed, but there is some evidence that enteric-coated1 peppermint oil capsules may be modestly effective in reducing several common symptoms of IBS—especially abdominal pain, bloating, and gas. Non-enteric coated forms of peppermint oil may cause or worsen heartburn symptoms.
  • Probiotics—live microorganisms (usually bacteria) that are similar to microorganisms normally found in the human digestive tract—have been associated with an improvement in IBS symptoms compared with placebo. Studies suggest decreases in some patients’ abdominal pain, bloating, and gas. Bifidobacterium and Lactobacillus strains have both been studied for their potential use in preventing and managing IBS symptoms.
  • While a few small studies have indicated that acupunctureA family of procedures that originated in traditional Chinese medicine. Acupuncture is the stimulation of specific points on the body by a variety of techniques, including the insertion of thin metal needles though the skin. It is intended to remove blockages in the flow of qi and restore and maintain health. has some positive effect on quality of life in people with IBS, systematic reviews have concluded that there is no convincing evidence to support the use of acupuncture for the treatment of IBS symptoms.

Evidence for other complementary health approaches sometimes tried in treating IBS—including melatonin, meditationA conscious mental process using certain techniques—such as focusing attention or maintaining a specific posture—to suspend the stream of thoughts and relax the body and mind., reflexologyFoot reflexology is a non-invasive complementary modality involving the use of alternating pressure applied to specific locations on the feet, hands, and outer ears that reflexologists believe to be mapped to specific areas of the body. Stimulation to these areas is thought to cause physiological changes in the body through the relaxation process., yogaA practice from Ayurvedic medicine that combines breathing exercises, physical postures, and meditation. It is intended to calm the nervous system and balance the body, mind, and spirit., and herbal remedies such as artichoke—is too limited to draw any conclusions about effectiveness.

1 Enteric-coating allows the peppermint oil to pass through the stomach unaltered so it can dissolve in the intestines. Note: If coated peppermint oil capsules are taken at the same time as medicines such as antacids, this coating can break down more quickly and increase the risk of heartburn and nausea.


NCCIH Research on IBS

NCCIH-supported research on IBS has looked at the following therapies:

  • Acupuncture
  • Probiotics for IBS symptoms in children
  • Traditional Chinese medicine
  • Mindfulness meditation versus support groups
  • Supportive patient-provider relations.

NCCIH-funded researchers are also looking at using brain-imaging techniques to study how a placebo might relieve pain in people with IBS.


If You Are Considering Complementary Health Approaches for IBS


Selected References


Herbal Medicines


Mind and Body Medicine

Peppermint Oil

  • Charrois TL, Hrudey J, Gardiner P, et al. Peppermint oil. Pediatrics in Review. 2006;27(7):e49–51.
  • Kligler B, Chaudhary S. Peppermint oil. American Family Physician. 2007;75(7):1027–1030.



For More Information

NCCIH Clearinghouse

The NCCIH Clearinghouse provides information on NCCIH and complementary and integrative health approaches, 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.: 
TTY (for deaf and hard-of-hearing callers): 

National Digestive Diseases Information Clearinghouse

A service of the National Institute of Diabetes and Digestive and Kidney Diseases, the clearinghouse responds to inquiries and offers publications. For a list of publications on irritable bowel syndrome, go to

Toll-free in the U.S.: 


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.

NIH Clinical Research Trials and You

The National Institutes of Health (NIH) has created a Web site, NIH Clinical Research Trials and You, to help people learn about clinical trials, why they matter, and how to participate. The site includes questions and answers about clinical trials, guidance on how to find clinical trials through and other resources, and stories about the personal experiences of clinical trial participants. Clinical trials are necessary to find better ways to prevent, diagnose, and treat diseases.

NIH National Library of Medicine's MedlinePlus

To provide resources that help answer health questions, MedlinePlus brings together authoritative information from the National Institutes of Health as well as other Government agencies and health-related organizations.

Web site:



NCCIH thanks the following people for their technical expertise and review of this publication: Vanessa Ameen, M.D., the National Institute of Diabetes and Digestive and Kidney Diseases; Susan Gaylord, Ph.D., University of North Carolina School of Medicine; Ted Kaptchuk, O.M.D., Harvard Medical School; and Wendy Weber, N.D., Ph.D., M.P.H., NCCIH.

This publication is not copyrighted and is in the public domain. Duplication is encouraged.

NCCIH 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 NCCIH.

* Note: PDF files require a viewer such as the free Adobe Reader.

NCCIH Pub No.: 
Date Created: 
July 2010
Last Updated: 
February 2012