Changes in intake of protein foods, carbohydrate amount and quality, and long-term weight change: results from 3 prospective cohorts

Background: Dietary guidelines recommend interchanging protein foods (e.g., chicken for red meat), but they may be exchanged for carbohydrate-rich foods varying in quality [glycemic load (GL)]. Whether such exchanges occur and how they influence long-term weight gain are not established. Objective: Our objective was to determine how changes in intake of protein foods, GL, and their interrelationship influence long-term weight gain. Design: We...