http://www.hon.ch/HONcode/background.html

The number of health sites is rapidly increasing. How can someone trust health sites? It's hard for someone who is not a medical professional to make sure that a site provides reliable health information. First, there is no rule you can apply. Even Web sites defined as "good" may not be useful and interesting for all readers. A good site for the patient can be useless for the physician. To find good (English-language) healthcare information, you can bypass the all-purpose commercial search engines and go straight to healthcare portals like Health on the Net (www.hon.ch) or Healthfinder (http://www.healthfinder.org/). These portals have already eliminated the irrelevant for you. A useful rule of thumb is first check out the governmental, not-for-profit and hospital Web sites, or those carrying an immediately recognized and trusted name. There is enough good material out there to keep you busy for days, if you want!