Health Topics A–Z
We are pleased to bring you our refreshed mobile-friendly health information. For each health topic, you’ll find a “Basics” version, which provides essential facts, and an “In-Depth” version, which provides more details. All of our health topic pages may be downloaded as a PDF, and can be printed or shared with others. Please note that this information is not intended to answer specific questions about a particular problem or condition. It should not be used for diagnostic or treatment purposes.
Health Topics by Category
Initiatives and Resources
Explore NIH Research
Many of our publications are available to view and download. You can also order some in print. Search our publications catalog.