Study foods
All meal components and snacks were prepared for ad libitum consumption. The size of the initial portions served at lunch and dinner (Study 1) and at breakfast, lunch and dinner (Study 2) were manipulated (see Table Portion-manipulated mealsTotal amount of food available per day including sides and other dishes: 6328 kcal (smaller); 6770 kcal (larger), in Study 1 and 5040 kcal (smaller); 5643 kcal (larger), in Study 2