American College of Gastroenterology : An excellent resource for a wide variety of information on heartburn, colon cancer, and other common digestive disorders.
 

American Gastroenterological Association : Another excellent site featuring treatment guidelines and information for health professionals

Centers for Disease Control : This site has advice on hepatitis, gastrointestinal infections, immunization, and world travel.
 

American Liver Foundation : Information about liver diseases.
 

Crohn’s and Colitis Foundation of America : A worldwide clearinghouse of information on inflammatory bowel disease.
 

American Cancer Society : This in-depth site contains facts and recommendations about various cancers.