MedlinePlus is the National Institutes of Health's Web site for patients and their families and friends. Produced by the National Library of Medicine, the world’s largest medical library, it brings you information about diseases, conditions, and wellness issues in language you can understand. MedlinePlus offers reliable, up-to-date health information, anytime, anywhere, for free.
Healthfinder.gov is a prevention and wellness resource provided by the government for health professionals, students, individuals, and families. The site includes basic, evidence-based health information in English and Spanish that’s actionable and easy to use.
The Mayo Clinic’s Patient Care and Health Information pages enables A-Z searches in four areas: diseases and conditions, symptoms, tests and procedures, and drugs and supplements.