The Volumetrics diet was developed by nutrition professor Barbara Rolls to help with weight loss.
It uses the concept of food calorie density (CD). Calorie-dense foods pack more calories per bite. Eating more of these foods means more calories per bite. This can lead to weight gain.
The goal is to eat foods with low calorie density. This allows us to eat more bites for fewer calories. Low CD foods generally have more water and fiber – think fruits and non-starchy vegetables. Other low CD foods are whole grains, lean protein, legumes and low fat dairy.
High CD foods like oils, nuts, fatty foods and sugars are best used in small amounts or avoided completely.