What We Study

Scientist in safety gear examining a petri dish


Since its founding in 1978, NTP has studied almost 3,000 substances for a variety of health-related effects. We use a variety of approaches, including in vitro and in vivo studies, literature-based analysis, and computational models.

What We Study

Highlighted Research Topics

Notable substances, exposures, and mixtures that have recently been studied by NTP. Go

Health Effects Assessments

Learn how NTP is evaluating and integrating different types of evidence to inform public health decisions on effects from environmental exposures. Go

Testing Program

Learn about the in vivo and in vitro study types used by NTP researchers and scientists. Go

New Approach Methodologies

NICEATM: Alternative Methods

Learn how NTP supports the development and evaluation of new, revised, or alternative methods to identify hazardous substances. Go

NTP Laboratory Research

Learn how laboratory research helps scientists identify and understand potential health-related issues for environmental exposures. Go


Learn about this interagency initiative to develop new ways to rapidly test whether substances have the potential to adversely affect human health. Go