The Effects of Protein Source on Appetite Control, Satiety, and Subsequent Food Intake

The investigators propose a randomized, tightly-controlled breakfast trial in normal to overweight adults that will test whether the consumption of various types of protein-rich meals, containing \~24g of protein, will differentially alter food intake and meal initiation through proposed appetite and satiety mechanisms. Aim 1: To examine whether the consumption of protein-rich meals that vary in protein quality (source) effect: 1. postprandial feelings of hunger, fullness, desire to eat, prospective food consumption 2. postprandial fluctuations in key appetite and satiety hormones 3. eating initiation (i.e., motivation to eat (again)) 4. food cravings Aim 2: To examine whether the consumption of protein-rich meals that vary in protein quality (source) effect: 1. energy intake and food choice within the breakfast meal 2. energy intake and food choice at the next eating occasion 3. energy intake and food choice across the entire day