A measured look at Volumetrics, calorie density, and the reported soup findings, with cautions about nutrition, training fuel, and digestive tolerance.
On September 22, 2026, Seoul Economic Daily revisited Volumetrics, an eating approach built around lower-calorie-density foods. Its report described how foods rich in water and fiber can provide greater food volume for comparatively fewer calories. The central idea is to reconsider meal composition rather than make smaller portions the only strategy for managing intake.
This was renewed coverage of an established approach rather than the announcement of a new clinical trial. According to the report, Barbara Rolls developed Volumetrics around 2000 while working as a nutritional sciences professor at Pennsylvania State University.
The distinction matters. A useful idea about meal composition deserves attention without becoming a promise that eating until full will automatically produce weight loss.
Calorie density means the calories in a gram of food. As the Seoul Economic Daily report explains, Volumetrics emphasizes foods containing more water and fiber because they provide a larger amount of food for comparatively fewer calories.
Think of food quantity and energy intake as related but different questions. How much food is on the plate? How much energy does that food provide? Volumetrics draws attention to the difference instead of assuming that a smaller-looking meal is always the appropriate goal.
The report places these foods in its lowest-density category:
These examples are intended to make up a substantial share of meals within the approach. They are not presented here as a complete menu or as foods that everyone should eat without limit.
The same report places lean meat and legumes such as lentils and chickpeas in a moderate-intake category. Potatoes and brown rice also appear in that category. Its framework therefore includes more than vegetables and soup.
For someone worn down by restrictive dieting, the practical shift is in the question being asked. Rather than asking only how to make a meal smaller, the approach asks whether some of its volume could come from water- and fiber-rich foods. Our explanation of how meal size differs from calorie intake examines that distinction in more detail.
In BBC Food’s September 16, 2026 article, dietitian Laura Tilt explains that lower-energy-density meals may allow people to consume fewer calories without feeling less full. She also identifies protein and texture as influences on appetite alongside meal timing.
That makes volume one part of meal design rather than a complete explanation of hunger. A meal does not become suitable simply because it occupies more space. The useful question is whether its composition supports fullness while still meeting the person’s nutritional needs.
This is a reason to treat calorie density as a tool rather than a rule governing every food choice. For a closer explanation of the underlying concept, see our discussion of energy density and calorie intake.
The Seoul Economic Daily headline connects eating until full with losing weight. That is an appealing message for readers who associate weight management with enduring hunger. But the reporting supports a narrower conclusion about meal composition and intake.
According to the report, Rolls’ research team found that participants who ate broth-based soup before a meal consumed fewer calories overall while reporting the same level of fullness. This is the specific observation behind the soup discussion: lower reported energy intake did not come with lower reported fullness.
The coverage does not provide the study’s sample size or design. It also omits the duration and numerical calorie effect. Those gaps prevent a reliable estimate of the personal benefit or a conclusion about sustained weight change from that finding alone.
BBC Food separately reports an association between lower-energy-density diets and lower energy intake and body weight. However, its article does not identify the individual studies behind that summary. That association is not proof that Volumetrics produces weight loss for every person.
The practical takeaway is therefore about an option, not an assured outcome. Broth-based soup can be discussed as a food used in the reported research. The coverage does not justify turning it into a compulsory routine before every meal.
For readers making everyday decisions, the more useful question is whether a meal adjustment offers a workable balance of fullness and adequate nutrition. Weight change should not be treated as a test of determination or as the inevitable result of following a single food rule.
The Seoul Economic Daily report itself cautions that calorie density is not a complete measure of food quality. It specifically notes that nuts and seeds provide valuable nutrients despite their higher calorie density. Olive oil is another example it identifies.
The report places these foods in a small-amount category alongside foods such as candy and fast food. Sharing a density category does not make their nutritional roles interchangeable. The classification describes energy concentration rather than a complete nutritional judgment.
That distinction protects against an overly restrictive interpretation. The report warns that focusing too heavily on low calorie density could limit healthy fats and the nutrients they provide.
A balanced reading does not ask readers to remove every calorie-dense ingredient. It asks them to consider the overall composition of a meal without treating lower density as an automatic mark of superiority.
For example, vegetables and nonfat yogurt belong among the report’s lower-density choices. Nuts and olive oil belong among its higher-density choices. The useful lesson is that these categories describe different properties rather than opposing sides of a healthy-versus-unhealthy divide.
At WeightRestart, our emphasis is on sustainable habits and adequate nutrition rather than increasingly strict food rules. The same distinction guides our discussion of why feeling full is not the whole nutritional picture. Fullness deserves attention without becoming the only standard used to judge a meal.
BBC Food’s cautions help identify where a volume-focused approach needs a more individualized view. These concerns relate to training needs and digestive tolerance as well as a person’s relationship with eating. They are not a diagnosis of any individual reader.
Tilt warns that high-volume, low-calorie eating may provide insufficient energy or carbohydrate for people who train regularly. Her article identifies fatigue and poor recovery as possible warning signs of under-fuelling. Difficulty with workouts is another sign it discusses.
The practical implication is not that active people must avoid lower-density foods. It is that making meals progressively lower in calories should not override adequate energy and carbohydrate intake. Training needs belong in the conversation about meal composition.
Those experiencing persistent warning signs should seek individualized guidance from a qualified healthcare professional or dietitian. A general article cannot determine someone’s energy needs or explain the cause of their symptoms.
BBC Food also warns that a sudden increase in fiber can cause bloating and gas. Abdominal pain or constipation may occur as well. Its discussion gives particular attention to people who previously ate little fiber or have a gut condition such as IBS.
This makes digestive comfort a relevant consideration rather than something to dismiss in pursuit of a larger plate. The sensible interpretation is to account for tolerance instead of treating the highest possible food volume as a goal. Persistent digestive symptoms warrant individualized professional advice.
BBC Food advises people with previous eating-disorder experiences to avoid a volume-eating approach. That caution deserves to remain separate from the discussion of calories and fullness.
A strategy that encourages closer attention to meal size and energy density is not automatically appropriate for every relationship with food. Where eating-related distress is present, qualified support takes priority over adopting another dietary framework.
For everyone else, the editorial principle remains modest: lower-density foods are an option within balanced eating. There is no need to turn them into a competition for the largest plate or the smallest possible energy intake.
What deserves attention next is research that follows changes in meal composition through to sustained outcomes rather than stopping at a single eating occasion. Useful studies would report energy intake and fullness alongside weight change and nutritional adequacy. They should also examine digestive tolerance and suitability for people with different activity levels. Before a specific soup-first routine becomes a standard recommendation, clearer study-level evidence should establish who benefits and whether those benefits last.
WeightRestart shares research-led guidance on weight loss, metabolism, nutrition, strength, appetite, sleep and recovery. Our goal is to make complex health information clear, practical and useful for people building progress they can maintain.
Learn how to build a weight-management approach around better information, realistic expectations and habits you can keep using.
read the blog
