The American College of Gastroenterology is an organization of digestive disease specialists. The website contains information about common gastrointestinal problems.

The American Gastroenterological Association is a society of doctors who specialize in the digestive system (gastroenterologists). This Web site can help you find a gastroenterologist in your area. They also have patient information on many gastrointestinal diseases and disorders.

The International Foundation for Functional Gastrointestinal Disorders (IFFGD) is a nonprofit organization that provides information and support to adults and children affected by hard-to-diagnose gastrointestinal (GI) disorders. The website has information about GI symptoms and conditions such as irritable bowel syndrome, indigestion, gastroesophageal reflux disease (GERD), incontinence, gas, bloating, belching, heartburn, nausea, and belly pain.

The National Center for Complementary and Alternative Medicine (NCCAM) at the National Institutes of Health (NIH) explores complementary and alternative healing practices in the context of rigorous science, trains complementary and alternative medicine researchers, and gives out authoritative information.

This clearinghouse is a service of the U.S. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), part of the U.S. National Institutes of Health. The clearinghouse answers questions; develops, reviews, and sends out publications; and coordinates information resources about digestive diseases. Publications produced by the clearinghouse are reviewed carefully for scientific accuracy, content, and readability.