Comparison Of Energy Restricted Very Low Carbohydrate And Low Fat Diets On Weight Loss And Body Composition In Overweight Men And Women

Researchers at the University of Connecticut compared two popular diet approaches in 28 overweight adults to see which was more effective for weight loss and body composition changes. Participants followed both a very low-carbohydrate ketogenic diet (less than 10% of calories from carbs) and a traditional low-fat diet (about 60% carbs, 25% fat) in a controlled study design. Both diets restricted calories by 500 per day below each person's needs.

The results showed a clear advantage for the very low-carbohydrate approach. Men following the low-carb diet lost more total weight and body fat compared to the low-fat diet, despite actually eating about 300 more calories per day. This suggests the low-carb diet was more metabolically efficient for fat burning. Most women also responded better to the low-carb approach, particularly for losing dangerous trunk fat around the midsection.

The low-carb diet's superior results for trunk fat loss are especially significant from a metabolic health perspective. Excess abdominal fat is strongly linked to insulin resistance, diabetes, and cardiovascular disease. Reducing this type of fat can improve hormone function and metabolic markers more effectively than losing weight from other areas of the body.

This research supports what many clinicians observe in practice: that carbohydrate restriction can be a powerful tool for improving body composition and metabolic health. At VALIA Health, we use these insights to develop personalized nutrition strategies that optimize each patient's metabolic profile and long-term health outcomes.