Check the information with other sources. When in doubt, always consult a health professional. Your first clue is the domain name. Then, find the source of the Web site to be sure it is trusted and unbiased. Personal testimonials and sites that want to sell you something are not reliable sources.
Some companies make it difficult to find out who is putting out the information.
Often, these are drug companies trying to promote their own products. The information MAY be reliable, but you are better off with an unbiased source. A good Web site will note the date that information was posted. Medical information changes so quickly that you must be sure that your resource is up to date. From the Health Summit Working Group of Mitretek, a non-profit organization that provides a public benefit through the application of science and technology.