Guyton and Hall Textbook of Medical Physiology by Health, United States
Provides national health statistics, such as diabetes statistics, death rates for various diseases, drug use, and much more.
Merck Manual of Medical Information - Home Edition
This on-line version of the print book for consumers, details the symptoms, diagnosis, prevention, treatment, and prognosis of medical disorders.
Merck Manual -- Professional Edition
This on-line version of the print book for health professionals, details the symptoms, diagnosis, and treatment of medical disorders
MedlinePlus
Quality health information from the world's largest medical library, the National Library of Medicine.