all in the name: Look for credentials and affiliations ? websites run by government medical agencies, for instance, could be expected to have a high degree of credibility.

right diagnosis: Be wary of conflict of interest when scanning websites trying to sell products or services. The content may have been selectively chosen to favour a particular product or service.

screen test: Ask whether claims have references to peer-reviewed medical literature. Have the claims been screened by medical researchers not connected with those promoting the website?