American Society for Gastrointestinal Endoscopy
The ASGE has a collection of educational brochures designed for patients. These guides answer commonly-asked questions about gastrointestinal conditions, procedures, and treatments.
The American College of Gastroenterology The American College of Gastroenterology is dedicated to the advancement of medical treatment and scientific study of gastrointestinal disorders. They serve the evolving needs of physicians through high-quality scientific, humanistic, clinical, and cost-effective heathcare to gastrointestinal patients. They offer a free newsletter twice a week to promote GI health and inform patients of current findings in the field.
Put Your Embarrassment Aside: Get the Colonoscopy
This 2005 article from Jane E. Brody of the New York Times is a great testimonial for taking a preventative route for your gastrointestinal health.