Much of our dietary evidence comes from non-randomized epidemiologic data. In this episode, Robert Ostfeld, MD, MSc, FACC, and Walter Willett, MD, DrPH, discuss why findings from prospective, epidemiologic cohort studies are important in informing dietary recommendations, and what dietary principles are healthful across multiple populations, including the following key takeaways: Personal and planetary health are equally important for our own well-being and for that of future generations; a healthy, predominantly plant-based diet can achieve both of these goals. Although sustainable diets are necessary for planetary health, they are not sufficient; improvements in agricultural production, reduction in food waste, and rapid conversion to green energy are all needed. For more, visit www.acc.org/CardioNutrition Subscribe to CardiaCast