Thyroid Foundation of America About this site: Did you know that 13 million Americans have thyroid disorders, but over eight million of them don't know it? At this site you'll learn about the symptoms of and risks for thyroid disease. You'll also find out what the Thyroid Foundation of America is doing to support patients and fund medical research. (http://www.tsh.org/) Pluses: Excellent list of links to other thyroid sites. Minuses: Heavy promotion of the foundation and its fundraising efforts. Best feature: The articles section presents articles on thyroid diseases and conditions.