Healthfinder.gov has resources on a wide range of health topics selected from over 1,400 government and non-profit organizations to bring you the best, most reliable health information on the Internet.
Lab Tests Online has been designed to help you better understand the many clinical lab tests that are part of routine care as well as diagnosis and treatment of a broad range of conditions and diseases.
Produced by the National Library of Medicine, MedlinePlus brings you information about diseases, conditions, and wellness issues in language you can understand.
National Library of Medicine
The world’s largest biomedical library, NLM maintains and makes available a vast print collection and produces electronic information resources on a wide range of topics that are searched billions of times each year by millions of people around the globe.