Glossary · Biology
Visceral fat
In short
Visceral fat lies deep in the abdominal cavity between the organs — unlike subcutaneous fat, which you can pinch. It is metabolically active and is considered the less favorable of the two stores.
It is measured as a cross-sectional area in square centimeters, usually by computed tomography at the level of the navel. Waist circumference is only a rough approximation because it captures both types of fat together.
Visceral fat releases signaling substances and is statistically associated with insulin resistance, fatty liver and cardiovascular risk. That makes it a popular study target — and a classic stand-in: that a substance reduces this area can be well documented; that a health benefit follows from it is a separate question.
Caution with measurement methods: a DXA measurement underestimates visceral fat compared with computed tomography, and all the more so the more of it there is.
A smaller area in the abdomen is a measured value, not a health outcome.
Where this comes up in the fact checks
- Tesamorelin – The approved effect concerns exactly this area.
- Fasting – Calorie restriction reduces both types of fat, not only the visceral one.
- Zone 2 & VO2max – Endurance training acts on the same store, without a substance.
Related terms: Surrogate marker
Information only, not medical advice. The BK-Score is a subjective assessment according to disclosed rules – not a scientific evaluation. Scoring rules