Sarah Janssen, MD, PhD, MPH

Staff Scientist, Natural Resources Defense Council
[email protected]


Dr. Sarah Janssen is a Staff Scientist in the Health and Environment Program of the Natural Resources Defense Council (NRDC). NRDC is a national, nonprofit environmental action organization with over 550,000 members dedicated to the protection of public health and the environment. In her capacity as a Scientist with NRDC, Dr. Janssen provides scientific expertise for policy and regulatory decisions on a number of toxic chemicals, including endocrine disrupting substances. Her work has included research on flame retardants, cosmetics, plastics and plasticizers, breast cancer and threats to adult reproductive health and child development. She is board-certified in Preventive Medicine with a subspecialty in Occupational and Environmental Medicine. Dr. Janssen is also an Assistant Clinical Professor at the University of California, San Francisco in the Division of Occupational and Environmental Medicine and works part time at Kaiser Permanente of Northern California. Dr. Janssen is the author of numerous peer-reviewed publications and book chapters.

Dr. Janssen completed her MD and PhD in Reproductive Physiology at the University of Illinois, Urbana-Champaign in 2001. She did her residency training at the University of California, San Francisco which included a MPH in Environmental Health Sciences from the University of California, Berkeley.