Volumetrics is a diet plan developed by Dr. Barbara Rolls, a Professor of Nutrition and a Director of the Laboratory for the Study of Human Ingestive Behavior at Penn State University. The foundation of the Volumetrics Diet plan is satiety or the body’s signal that it is full. Volumetrics works on enhancing that feeling of fullness while eating fewer calories.
The key concept of this diet plan is looking at foods’ energy density – or the number of calories contained in a specific amount of food. For instance, water has zero energy density. Fats on the other hand, have a high energy density. Volumetrics then, promotes eating foods that have low energy density such as fruits and vegetables, and foods that have high water content.
According to experts, The Volumetrics diet is very sensible, and is based on healthy eating.
The diet does not require dieters to count calories. Instead, it makes people more aware of what kinds of foods have high or low energy densities so you can make better food choices. The diet also offers several sensible recipes that help dieters log their basic 1,600 or 2,000 calories per day.
The diet also encourages people to increase their physical activity by taking up an exercise.
On the other hand, some experts think that – and some dieters attest to this – the fullness that you get from eating Volumetrics meals is "fleeting."
Experts also think that Vlolumetrics may not be for everyone, satiety is different for everyone, and that some people learn to keep eating even if they already feel full. Feeling full may not be enough. There may be a need to change an individual’s approach to eating, lifestyle, and/or behaviors.
Experts also add that hunger is not always the reason why people eat. Social and emotional issues are overlooked.
Lastly, while Volumetrics does offer healthy recipes, most people do not have time to prepare special dishes, making it rather difficult for most people to follow.