2023: Kristina Petersen, PhD, APD, FAHA
Dr. Kristina Petersen is Associate Professor in the Department of Nutritional Sciences at Penn State University. She earned a Bachelor of Nutrition and Dietetics (Honors) degree from Flinders University (Australia) and a PhD in Nutrition from the University of South Australia (Australia). She completed postdoctoral training in public health and epidemiology at The George Institute for Global Health (Australia), and in clinical nutrition at Penn State. Dr. Petersen was an Assistant Research Professor at The Pennsylvania State University from 2018 to 2020. She joined the Department of Nutritional Sciences at Texas Tech University as an Assistant Professor in Fall 2020 and subsequently returned to Penn State. She has conducted seminal work on the health benefits of spices and herbs including a landmark controlled feeding study that examined the effect of four-week exposure to each of three spice levels incorporated into an Average American Diet among healthy overweight or obese subjects with at least one cardiometabolic risk factor. The study demonstrates that a relatively high amount of spices and herbs (6.6 grams per 2,100 kcal) lowered ambulatory blood pressure compared to lower amounts. The study also showed beneficial effects on alpha- and beta-diversity of the gut microbiome as well an enrichment of the family in the high vs. lower spice/herb diets. Her research has also shown beneficial effects of spices and herbs added to a high-saturated fat/high-carbohydrate meal on triglyceride concentrations and endothelial function as measured by flow mediated dilation (FMD). Another major area of her research has demonstrated that spices and herbs have the ability to increase the liking of foods that have been reduced in saturated fat, sodium and/or added sugars. The hypothetical effect of such changes on a US population-wide basis was estimated by analysis of data from the 2015-2018 National Health and Nutrition Examination Survey (NHANES). Replacement of recipes for 10 leading sources of such overconsumed dietary components with healthier versions based on spices and herbs were projected to lower consumption of saturated fat, sodium and added sugars by 11.4, 11.5 and 2.7%, respectively. Finally, Dr. Petersen is collaborating with other investigators at Penn State to conduct translational research designed to find the most effective ways to educate consumers about how to use spices and herbs to improve their health through higher diet quality.