The National Institutes of Health (NIH) is the primary U.S. federal agency that funds and conducts biomedical and public health research.
NIH support shapes the clinical research ecosystem through grant funding, training programs, and infrastructure investments at academic and research institutions. NIH-funded studies must meet strong expectations for human subject protections, data management, and reporting transparency. Many NIH programs also encourage data sharing, reproducibility, and rigorous study design to maximize scientific value. NIH involvement often strengthens research credibility by promoting ethical governance, standardized oversight, and high-quality evidence generation.