Lean Individuals with Belly Fat Face Higher Mortality Risk, Study Finds

Lean individuals who carry excess fat around their abdomen, often described as "apple-shaped," face a substantially higher risk of mortality, according to a doctor citing international research. These individuals, sometimes called "puff pastry people," are up to 2.42 times more likely to die in the future than those who are overweight but have a more balanced fat distribution and a normal waistline.

Dr. Hsiao Chieh-chien, a specialist in weight management, explained that muscles act like "suitcases" for the sugar we consume. People with larger "suitcases" (more muscle mass) can store sugar effectively, maintaining stable blood sugar levels. However, "puff pastry people" have limited storage capacity. Unused sugar accumulates, forcing the liver to convert it into fat. This fat can then deposit in the liver, causing fatty liver disease, or accumulate in the abdominal cavity, leading to inflammation, insulin resistance, and ultimately, uncontrolled blood sugar.

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Lean individuals with abdominal fat are up to 2.42 times more likely to die in the future than those who are overweight but have a normal waistline.

Research tracking over 15,000 men found that those with normal weight but higher abdominal fat had a significantly greater future mortality risk. A review in "Cell Metabolism" also highlighted that the key is not just body weight, but where fat is stored and the amount of muscle mass one possesses.

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Muscles are the body's largest glucose storage.

To assess visceral fat, doctors recommend using the waist-to-height ratio (WHtR), with a simple guideline being that the waist circumference should not exceed half the height. For example, someone 160 cm tall should aim for a waist measurement below 80 cm. This metric is increasingly being adopted in medical guidelines, with some suggesting it may be more informative than BMI alone.

To combat visceral fat accumulation, Dr. Hsiao suggests four key strategies: prioritizing sleep, as insufficient sleep can increase cortisol levels and promote abdominal fat storage; engaging in regular Zone 2 aerobic exercise (moderate intensity) for 30-45 minutes, 2-3 times a week; incorporating strength training to build muscle mass, which acts as a significant sugar reservoir; and adopting a balanced diet, consuming more carbohydrates on days with heavy exercise and less on sedentary days, while opting for protein and fiber-rich foods.

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Waist circumference should not exceed half the height.