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Because of a lapse in Government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding Government operating status and resumption of normal operations can be found at OPM.gov.

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National Center for Complementary and Integrative Health

Evidence-Based Medicine: Literature Reviews

When talking to your patients about complementary health approaches, you want to be able to answer the question: Is there any scientific evidence that this complementary product or practice works and is safe? The resources on this page will help inform you about what the science says (limited to the past 5 years).

For more information please contact the NCCIH Clearninghouse.