Diabesity
Belly Fat, Diabetes and Metabolic Health: Why Waist Matters
Written by Dr. Ajay V. Kaduskar, Diabetologist, Nagpur
MD (Medicine), PGDHSc (Diabetology), FEACD (The Netherlands)
Published · 4 min read
Quick answer
Belly fat, also called visceral or abdominal fat, surrounds organs such as the liver and pancreas and releases substances that cause inflammation and insulin resistance. A larger waist raises the risk of type 2 diabetes, fatty liver, high blood pressure and heart disease, even when BMI looks normal. For Asian Indians, waist targets are lower: below about 90 cm for men and 80 cm for women.
Two people can weigh the same and have very different health risks. The difference is often where the fat sits. Fat around the belly is more dangerous than fat on the hips or thighs, and it is especially common in Indians.
What is visceral fat?
There are two main types of body fat:
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Subcutaneous fat: Sits under the skin. It is the pinchable fat.
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Visceral fat: Lies deep inside the abdomen, around organs. It is metabolically active and harmful.
Many Indians have more visceral fat at a lower BMI, a pattern sometimes called "thin-fat" or "normal weight obesity".
Why is belly fat harmful?
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It releases inflammatory chemicals.
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It drains fatty acids directly into the liver, causing fatty liver and insulin resistance.
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It raises triglycerides and lowers HDL (good) cholesterol.
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It increases blood pressure.
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It raises the risk of heart disease and stroke.
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It is linked to sleep apnoea and some cancers.
How do you measure it?
Waist circumference
Measure with a tape around the abdomen at the level of the navel, after a normal breath out. For Asian Indians, a value above about 90 cm in men and 80 cm in women is considered high.
Waist-to-height ratio
Divide waist by height. A ratio above about 0.5 suggests increased risk.
Other tests
Ultrasound, DEXA or CT scans can estimate visceral fat, but they are rarely needed for routine care.
Why is BMI not enough?
BMI does not tell you where fat is stored. A person with a normal BMI but a large waist may have a high risk. Using both BMI and waist gives a better picture.
How can you reduce belly fat?
Eat for metabolic health
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Cut sugary drinks, sweets and refined flour.
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Choose pulses, vegetables, nuts and whole grains.
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Include protein at every meal.
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Avoid late, heavy dinners and frequent snacking.
Be active
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Walk briskly for 30 minutes most days.
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Add strength exercises two to three times a week.
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Break up long periods of sitting.
Sleep and stress
Poor sleep and chronic stress increase belly fat through hormones such as cortisol. Aim for seven to eight hours of sleep and learn simple stress management.
Limit alcohol
Alcohol adds calories and encourages fat storage in the abdomen and liver.
Medical help
In people with obesity or diabetes, medicines such as GLP-1 medicines or metabolic surgery may help reduce visceral fat when lifestyle is not enough.
Does spot reduction work?
No. Sit-ups alone do not remove belly fat. Fat is lost from the whole body, and visceral fat often reduces early when you lose weight.
When should you see a doctor?
Get checked if your waist is above the targets, you have a family history of diabetes, or you have high blood pressure, cholesterol or fatty liver. A blood sugar, HbA1c and lipid test are good starting points.
Points to keep
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Visceral belly fat is more harmful than fat elsewhere.
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Waist size is a simple but powerful health measure.
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Indian targets are lower than international ones.
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Diet, exercise, sleep and weight loss reduce belly fat.
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Early testing can prevent diabetes and heart disease.
Your tape measure tells you more than your weighing scale. Small, regular steps can shrink your waist and lower your risk. For a personalised assessment and plan, consult Dr. Ajay V. Kaduskar, a diabetologist at Niramay Clinics in Nagpur.
Sources and further reading
Frequently asked questions
For Asian Indians, a waist below about 90 cm for men and 80 cm for women is considered healthy. Higher values increase the risk of diabetes and heart disease.
Because it lies around organs and releases inflammatory substances that cause insulin resistance, fatty liver and high cholesterol. It strongly raises diabetes and heart risks.
Yes. Many Indians have a normal BMI but a large waist and high visceral fat. This pattern still increases metabolic risk, so waist measurement is important.
Visceral fat often responds early to weight loss and exercise. A loss of 5 to 10 percent of body weight can reduce it noticeably. Aim for gradual, steady change.
No. Crunches strengthen muscles but do not burn fat from the belly alone. A combination of diet, aerobic activity and strength training reduces overall and visceral fat.
Yes. Visceral fat is a major driver of insulin resistance, which leads to prediabetes and type 2 diabetes. Reducing waist size lowers this risk.
Related reading
- Full guide: diabetes and obesity
- What Is Insulin Resistance? Symptoms and Causes
- Fatty Liver and Diabetes: Why They Occur Together
- How Much Weight Loss Can Improve Type 2 Diabetes?
- Why Is Weight Loss So Hard With Type 2 Diabetes?
- What Is Diabesity? Understanding Diabetes and Obesity Together
If you would like advice suited to your own reports and medicines, you can book an appointment or visit Niramay Clinics in Dhantoli, Nagpur.
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