Barbara Rolls

About the Author

Barbara Rolls, PhD, is a renowned nutrition scientist and professor of nutritional sciences at Pennsylvania State University, where she has dedicated her career to researching how food volume and energy density influence eating behaviors and weight management. As the Helen A. Guthrie Chair in Nutrition, she has authored numerous studies and books that challenge traditional dieting paradigms, emphasizing sustainable strategies for feeling satisfied with less. Her pioneering Volumetrics approach, grounded in decades of empirical research, empowers individuals to make mindful food choices that promote long-term health without deprivation. Rolls' work has been featured in major publications and media outlets, inspiring a shift toward intuitive, science-backed eating habits that prioritize fullness and enjoyment over calorie counting.