Official website of the National Institutes of Health (NIH). NIH is one of the world's foremost medical research centers. An agency of the U.S. Department of Health and Human Services, the NIH is the Federal focal point for health and medical research.

Find science-based health information on symptoms, diagnosis, treatments, research, clinical trials and more from NIH, the nation’s medical research agency.

The National Institutes of Health (NIH) is the primary agency of the United States government responsible for biomedical and public health research. It was founded in 1887 and is now part of the United States Department of Health and Human Services.

The National Institutes of Health (NIH), a part of the U.S. Department of Health and Human Services, is the nation’s medical research agency — making important discoveries that improve health and save lives.

NIH Virtual Tour: National Library of Medicine. NLM is the world's largest biomedical library and a national resource for health professionals, scientists, and the public.

Welcome to NCBI. The National Center for Biotechnology Information advances science and health by providing access to biomedical and genomic information.

As an Institute within NIH, NIDDK conducts and supports research on many of the most common, costly, and chronic conditions to improve health.

The NIH Clinical Center is the nation’s largest hospital devoted entirely to clinical research.

Find NIH Clinical Center Trials. The National Institutes of Health (NIH) Clinical Center Search the Studies site is a registry of publicly supported clinical studies conducted mostly in Bethesda, MD.

Jan 27, 2025 · Register now for NIH Library Training classes being offered in December and January!