The National Institutes of health (NIH) serves as the primary medical research agency for the United States government, operating under the U.S. Department of health and Human Services. Its core mission is to conduct and support biomedical research to uncover fundamental knowledge about the nature and behavior of living systems, which is then applied to enhance health, lengthen life, and reduce the burdens of illness and disability. The agency is composed of 27 separate institutes and centers, each with a specific research agenda, ranging from cancer and heart disease to mental health and neurological disorders.

https://www.nih.gov/