The department for Toxicological and EnviRonmental Risk Assessment (TERRA) includes four Irset groups that have developed a large panel of assays. The groups involved carry out internationally recognized research in fields such as molecular and cell biology, biochemistry, biophysics and neuroendocrinology all with the common aim of better understanding the complex relationship of health and environment.

Four major fields are covered by TERRA:

- Endocrine disruption (contact Farzad Pakdel)

- Immune response (contact Michel Samson and Laurent Vernhet)

- Cellular stress and toxicity (contact Dominique Lagadic-Gossmann)

- Transport, Distribution and Metabolism (contact Sophie Langouet)