Professional Profile
Dr. Isabel Lea is a toxicologist in ToxStrategies’ Health Sciences practice with more than 20 years of experience evaluating scientific evidence related to diverse chemicals and their potential impacts on human health. Her work focuses on hazard identification and the systematic evaluation of toxicological and mechanistic evidence to support regulatory decision-making and risk-based assessments. Dr. Lea has extensive experience synthesizing multiple lines of evidence, including in vivo, in vitro (including high-throughput screening), and in silico data, to characterize potential health hazards across a wide range of chemical classes.
Dr. Lea has supported clients navigating regulatory requirements for the identification of endocrine disruptors. She has experience applying frameworks developed by the European Chemicals Agency (ECHA) and European Food Safety Authority (EFSA) for pesticide and biocide assessments and has evaluated evidence across estrogen, androgen, thyroid, and steroidogenesis (EATS) pathways. This expertise has been used to prepare submissions under the endocrine disruptor provisions of the EU Classification, Labelling, and Packaging (CLP) Regulation, which requires a comprehensive evaluation of mechanistic and apical evidence and the integration of findings into a clear, weight-of-evidence assessment aligned with regulatory expectations.
Dr. Lea also conducts International Agency for Research on Cancer (IARC) readiness evaluations to help clients understand and proactively manage the potential carcinogenic hazard profile of substances prior to formal IARC review. She evaluates the scientific literature to anticipate how evidence may be interpreted by an IARC Working Group and identifies key strengths, limitations, and data gaps. Dr. Lea has experience organizing mechanistic evidence using the key characteristics of carcinogens (KCCs) and integrating these data with in vivo, in vitro, and high-throughput screening results within a mode-of-action framework to assess biologically plausible pathways linking exposure to carcinogenic outcomes.
Dr. Lea also has extensive experience developing, managing, and curating toxicological databases. She possesses in-depth knowledge of major publicly available toxicology data platforms, including the National Toxicology Program’s Chemical Effects in Biological Systems (CEBS) database and the Integrated Chemical Environment (ICE) database developed by the NTP Interagency Center for the Evaluation of Alternative Toxicological Methods (NICEATM). Through this work, she has developed a strong understanding of the structure and interpretation of large toxicology datasets, enabling her to efficiently identify relevant data sources, interpret complex datasets, and integrate information across platforms to support hazard identification and weight-of-evidence evaluations.
Dr. Lea has authored and co-authored publications in peer-reviewed journals, served as a reviewer for scientific manuscripts, and regularly participates in professional conferences and scientific meetings. She is a certified Project Management Professional (PMP) with extensive experience leading multidisciplinary teams and managing complex scientific projects, ensuring the timely delivery of high-quality work products while maintaining strong client engagement and satisfaction.