Remember that .gov websites are often the best source of health information. So, if you to look at only .gov sites, search your topic and add "site:.gov" to your search. Example: memory loss site:.gov
You can also try site:.org and site:.edu but you will have the best luck site:.gov.
REMEMBER, .COM websites are NOT the best sources of information for college research.
Avoid WebMD.com, About.com, and other .coms....