Visceral Fat: The Hidden Fat Worth Getting to Know

When we talk about body fat, it is easy to picture one big, uniform thing. In reality, your body stores fat in different places, and where it sits turns out to matter. One type in particular, visceral fat, has been getting a lot of attention from researchers, and the news around it is surprisingly encouraging. Let’s get to know it together. This is general education, not medical advice.

Two kinds of fat, two different homes

Most of your body fat is subcutaneous: it sits just under the skin, and it is the fat you can pinch. Visceral fat lives deeper, in the space inside your abdomen around organs such as the liver and intestines. Both types are a normal part of being human, and fat does helpful jobs, from storing energy to cushioning organs. The interest in visceral fat comes from how it behaves when there is a lot of it.

Why researchers keep an eye on it

In 2019, a joint position statement from the International Atherosclerosis Society and the International Chair on Cardiometabolic Risk, led by Ian Neeland and colleagues, was published in The Lancet Diabetes & Endocrinology. It pulled together the evidence that visceral fat, along with fat that settles in places like the liver and around the heart (called ectopic fat), is an emerging risk factor for type 2 diabetes, atherosclerosis and cardiovascular disease. The authors also called for public health messages that focus on these fat depots and not only on body weight.

That fits with what we explain in our guide to BMI: a weight-based number cannot see where fat is stored, so two people with the same BMI can have quite different amounts of visceral fat.

How you can keep track at home

The gold-standard way to measure visceral fat is imaging, such as a scan, and that is mostly used in research. For everyday life, the position statement points to simple stand-ins, and waist circumference is among the most widely used. A tape measure is a very friendly tool:

• Measure the same way each time. Same spot, relaxed breath out, similar time of day.
• Watch the direction over weeks, not a single reading, just as with the scale.
• Add it to the bigger picture. Energy, strength, sleep and checkups with your clinician tell you more than any one number.

Disclosure: Weight Wire’s free body measurements calculator includes waist-based ratios, and the private journal can keep your measurements over time. They are estimates, and they were not part of the research described here.

The cheerful part: movement reaches visceral fat

In 2016, Verheggen and colleagues published a meta-analysis in Obesity Reviews that pooled 117 studies with 4,815 participants and compared exercise with calorie-reduced diets. Here is what stood out:

• Both approaches lowered visceral fat. Diet and exercise each did the job, and the difference between them was not statistically significant.
• Diet led to more weight loss, which is what you would expect.
• Exercise helped even when the scale did not move. When there was no weight loss, exercise was linked to roughly a 6 percent drop in visceral fat, while diet alone showed almost none (about 1 percent).

The authors pointed out that total body weight is not a perfect marker of what is happening with visceral fat. So if your scale has been stubborn lately, a walk, a strength session or a swim may still be doing quiet good work. Our guides to walking, strength training for beginners and cardio and weights are friendly places to start.

A kind word about fat distribution

Where your body stores fat is shaped by many things, including genes, age, sex and hormones, and some life stages tend to shift it. That means a bigger waist is not a character flaw, and it is nothing to feel ashamed of. It is simply information, and a good reason to have a friendly conversation with your clinician. Our article on weight stigma explains why kindness toward yourself is part of the plan.

Sources

• Neeland IJ, Ross R, Despres JP, et al. Visceral and ectopic fat, atherosclerosis, and cardiometabolic disease: a position statement. The Lancet Diabetes & Endocrinology, 2019;7(9):715-725 (abstract and summaries read; full text not read, so no waist thresholds are quoted).
• Verheggen RJHM, Maessen MFH, Green DJ, et al. A systematic review and meta-analysis on the effects of exercise training versus hypocaloric diet: distinct effects on body weight and visceral adipose tissue. Obesity Reviews, 2016;17(8):664-690 (abstract and summaries).