Why can visceral fat matter more than body weight?
Last content review 2026-09-23
The short answer
Fat stored around the abdominal organs behaves differently from fat under the skin: it is metabolically active and drains directly towards the liver. That is why waist measurement often tells a clinician more about metabolic liver risk than weight alone.
What is happening?
Visceral fat releases free fatty acids and signalling molecules into the portal circulation, which goes straight to the liver.
It is associated with insulin resistance and low-grade inflammation.
South Asian populations tend to have higher visceral fat and metabolic risk at a lower BMI, which is why lower waist and BMI thresholds are used in Indian guidance.
Why does this matter?
Someone with a "normal" weight can still carry substantial visceral fat.
Waist circumference is simple, free and clinically useful.
What does the evidence say?
The cardiometabolic criteria in the MASLD definition include waist circumference thresholds that are ethnicity-adjusted.
Lower BMI and waist cut-offs for South Asians are used in Indian consensus guidance on obesity and metabolic risk.
Key takeaway
Measure your waist, not only the weighing scale — the liver responds to where fat is stored.
Sources & references
EASL, EASD and EASO
EASL–EASD–EASO Clinical Practice Guideline on MASLD (2024) · Clinical guideline
View original sourceThe Lancet Gastroenterology & Hepatology
Global prevalence, incidence, and outcomes of non-obese or lean NAFLD: a systematic review and meta-analysis (2020) · Systematic review
View original source
This page is general health education. It is not a diagnosis, and it cannot replace advice from your treating doctor. Never start or stop a prescribed medicine based on what you read here.
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