Dufault completed her PhD at A.T. Still University. She retired early from her position as a US Public Health Service officer at the Food and Drug Administration (FDA) to publish her findings of mercury in high fructose corn syrup. As an FDA whistleblower, she could not find employment as a researcher, so she founded the non-profit Food Ingredient and Health Research Institute where she works as a volunteer. She supplements her income working as a licensed special education teacher. Dr. D is considered a leader in the field of nutritional epigenetics with 726 citations according to Google Scholar.