There are literally thousands of websites with medical information. However a large part of this information is of dubious quality and full of bias. I selected these websites because they are published by organizations that promote scientific research and provide updated consensual information. In most of these web sites there is a section devoted to the general public, information quality is generally excellent and updated very frequently.

American Gastroenterological Association

gastro.org/practice-guidance/gi-patient-center/

American College of Gastroenterology

www.gi.org

American Society for Gastrointestinal Endoscopy

www.asge.org

American Association for the Study of Liver Diseases

www.aasld.org

American Liver Foundation

liverfoundation.org

National Institutes of Health

www.nih.gov