Research shows that liquid calories are less filling than solid food.
A 2020 review in Scientific Reports indicates that chewing and the time food spends in the mouth play a role in when we feel full.
Beverages pass more quickly through the stomach and do not activate the body’s satiety hormones in the same way.
As a result, you may still feel hungry even after consuming a large number of calories.
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Studies published in Nutrition and Metabolic Insights also show that the body often does not compensate for calories consumed through drinks during the day by eating less later.
Blood sugar and disease
According to the American Heart Association, sugar from soda, juice, and energy drinks is rapidly absorbed into the bloodstream. This can cause significant fluctuations in blood sugar levels.
Research published in Nutrients (1) links a high intake of sugary drinks to an increased risk of insulin resistance and type 2 diabetes.
A comprehensive review published in Diabetes & Metabolism Journal in 2026 further shows an association between both sugar-sweetened and artificially sweetened beverages and a higher risk of cardiovascular disease.
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Other studies in Diabetes Obesity Metabolism suggest that high consumption of sugary drinks is associated with increased fat around the internal organs, which raises the risk of premature death.
Not all drinks are the same
However, there are differences between beverages. Research in Nutrients (2) shows that protein drinks containing whey protein can increase feelings of fullness.
A controlled trial published in Nutrients (3) involving older adults with overweight and type 2 diabetes found that protein-rich drinks, combined with diet and exercise, can help preserve muscle mass and maintain stable blood sugar levels.
Overall, the research shows that beverages can be included as part of the diet. However, if they replace most solid foods, they may increase the risk of lifestyle-related diseases.
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Sources: Verywell Health, Scientific Reports, Nutrition and Metabolic Insights, American Heart Association, Nutrients (1), Diabetes & Metabolism Journal, Diabetes Obesity Metabolism, Nutrients (2) og Nutrients (3).
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