Gregory Steinberg is a Professor of Medicine and Canada Research Chair in Metabolism and Obesity. His research aims to understand how obesity, nutrition and exercise influence health at the molecular level. Gregory’s expertise helps him to utilize genetically modified mice in metabolic studies under physiological stressors such as exercise and high calorie diets. His in vivo studies assess metabolism in genetically modified mice and are complemented with work utilizing advanced techniques in protein chemistry and molecular biology with an emphasis on mass spectrometry and gene expression analysis. Gregory’s work in child obesity and metabolism allows for a cross-disciplinary analysis of the ways that childhood health outcomes progress into later life – a trajectory often ignored in the study of aging.