MedlinePlus

MedlinePlus is a free website that gives free consumer health information for patients, families, and health care providers. The site has information from the United States National Library of Medicine, the National Institutes of Health (NIH), other U.S. government agencies, and health-related organizations. The U.S. National Library of Medicine produces and maintains the site. MedlinePlus includes a companion site in Spanish, which offers similar content for the Spanish-speaking community. It also offers a mobile site in both English and Spanish optimized for display on mobile devices. Over 150 million people from around the world use MedlinePlus each year. 
MedlinePlus contains: