Normal weight people who ate 1.5 medium peeled apples, which contained about 125 calories, ate an average of 187 fewer calories at lunch than people who were given applesauce or nothing according to a study from Barbara Rolls at Pennsylvania State University who has written a lot about how eating bulky foods that are low in calories—low calore dense foods—reduces food intake.

Children ate 18 percent more calories when they were given an entree that was more calorie dense, that is food that contained more calories for a given amount of food, according to a study by Jennifer Fisher at the U.S. Department of Agriculture’s Children’s Nutrition Research Center in Houston, Texas, USA and colleagues.

Children ate 34 percent more calories when they were given larger portions of lunch that contained more calorie-dense foods according to a study by Jennifer Fisher at the U.S. Department of Agriculture’s Children’s Nutrition Research Center in Houston, Texas and Barbara Rolls at Pennsylvania State University in University Park, Pennsylvania, USA.

Women ate 575 fewer calories per day, a 24 percent decrease in calories, when the calorie density of the food provided to them was 25 percent less than normal according to research from researchers at Pennsylvania State University in University Park, Pennsylvania, USA. 

People who reduced the calorie-density of their diets the most, by eating lots of fruits and vegetables, lost the most weight according to a a study from Barbara Rolls at The Pennsylvania State University and others.

The best diet, according to Consumer Reports, is “The Volumetrics Eating Plan” by Barbara Rolls, Ph.D., a professor in the department of nutritional sciences at The Pennsylvania State University.

Patients following a high carbohydrate, low calore dense diet lost an average of 8.8 pounds according to a study from the University of Alabama at Birmingham EatRight Weight Management Program.

Eating foods that are high in volume, but low in calories—called low energy-density foods—is an effective strategy for losing weight and helping to prevent weight gain according to a new study from Barbara Rolls at Penn State University.

Women who ate a salad before a meal reduced the calories eaten at that meal by by 7 to 17 percent according to a recent study by Barbara J. Rolls, professor of Nutritional Sciences at Pennsylvania State University in University Park, Pennsylvania, USA.

High fat diets tend to increase calorie intake according to a lot of research. However, a high fat diet may not increase calorie intake more than a low fat or medium fat diet provided the calorie density of the foods are similar. 

The calorie density of foods, rather than the fat content, affects how much a person eats according to a recent study.