How Does Waist Circumference Affect Healthy Aging?

What is visceral fat?

The layer of fat directly beneath the skin is called subcutaneous fat. Visceral fat, on the other hand, is located deeper within the abdominal cavity, including around the intestines and internal organs.

It is particularly metabolically active and is more strongly associated with cardiometabolic diseases than many other fat depots.

This is why waist circumference can provide information that body weight alone cannot. Two people can have the same BMI (Body Mass Index) but very different amounts of visceral fat. A larger waist circumference is also associated with higher cardiovascular risk even when BMI is comparable.

For people interested in longevity, this leads to an important principle:

Don’t just pay attention to how much you weigh – also pay attention to where your body stores fat.

With long-term excess calorie intake (obesity accompanied by increasing visceral fat accumulation), fat cells become larger and change their behavior as a result of metabolic stress. Their metabolic activity changes, as do the signals they send to the rest of the body.

Innate immune cells (ILC2 cells) are necessary for maintaining a stable metabolism in adipose tissue. Obesity significantly impairs the number and function of these immune cells, contributing to the progression of metabolic inflammation.²

Visceral fat communicates more strongly with the immune system, particularly with macrophages and T cells. The result is low-grade but persistent inflammation throughout the body, accompanied by subtle, chronic background signals.¹

Inflammatory messenger molecules and altered metabolic products (“metabolites”) can, over the long term, affect organs such as the liver, blood vessels, and muscles, ultimately influencing the entire organism.

Visceral fat is one node in a biological network – not the master switch of aging. It interacts with many other factors that influence longevity.

Therefore, it makes a great deal of sense to follow some basic principles:

• Keep an eye on waist circumference
• Exercise regularly
• Maintain a healthy long-term diet, for example a Mediterranean-style diet
• Consider visceral fat in the context of other well-established risk factors, such as blood pressure, LDL cholesterol, long-term blood glucose levels, and others

Following these principles helps connect body composition, cardiovascular prevention, and healthy aging.

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