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The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world

The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert co...

Why do low oxygen levels cause altitude sickness?. Altitude.org is charity-funded and written by independent doctors.

Health information for consumers on first aid for medical emergencies, accidents and injuries, symptoms and treatment of disease and health conditions, and physical and the emotional well-being that contribute to general wellness.

CDC Centers for Disease Control and Prevention - Your Online Source for Credible Health Information

Trusted medical information to encourage healthy living. Enjoy free health tools and view detailed doctor-reviewed information about diseases, medical symptoms, treatments, drugs, and nutrition.

Medical news and health news headlines posted throughout the day, every day

A healthy balance of the mind, body and spirit

Read doctor-produced health and medical information written for you to make informed decisions about your health concerns.

UpToDate is an evidence based, peer reviewed information resource, available via the Web and Mobile Devices. Our community includes over 4,400 leading physicians, peer reviewers, editors and over 385,000 users. UpToDate includes access to over 8,300 ...

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