Metabolic syndrome
Metabolic syndrome is a cluster of five measurable risk factors — abdominal obesity, high blood pressure, high triglycerides, low HDL cholesterol, and elevated blood sugar. Having three or more of the five roughly doubles cardiovascular disease risk and raises type 2 diabetes risk about fivefold — more than any single factor alone. It's a risk cluster, not diabetes itself.
How we assess metabolic syndrome
Waist Circumference Measurement
Using thresholds appropriate for South Asian body composition, which differ from general/Western cutoffs.
Blood Pressure Check
Measured as part of the same assessment, not a separate visit.
Blood Tests
Fasting glucose, triglycerides, and HDL cholesterol.
Counting Your Criteria
Three or more of the five criteria together confirm metabolic syndrome.
A Combined Risk Conversation and Plan
Your overall risk and a management plan addressing all the relevant factors together.
Symptoms
- No symptoms by itself — it's identified by the combination of measurements and lab results, not a feeling
Causes & risk factors
- Insulin resistance
- Excess weight, particularly abdominal obesity
- Physical inactivity
- A family history of diabetes or heart disease
The five diagnostic criteria
Metabolic syndrome is diagnosed when three or more of the following five criteria are present — no single measurement or lab result is enough on its own.
- Three or more of these five criteria, together, confirm a diagnosis of metabolic syndrome
| Criterion | Threshold | Note |
|---|---|---|
| Waist circumference | ≥90cm (men) or ≥80cm (women) for South Asians | Lower than the general/Western threshold — see the next section |
| Blood pressure | ≥130/85 mmHg, or on treatment for high blood pressure | Either the reading or being on treatment counts |
| Fasting glucose | ≥100 mg/dL, or on treatment for high blood sugar | Includes prediabetes-range readings, not only diabetes |
| Triglycerides | ≥150 mg/dL, or on treatment | One of two lipid criteria |
| HDL cholesterol | <40 mg/dL (men) or <50 mg/dL (women), or on treatment | Low HDL, not high LDL, is the specific criterion here |
Waist circumference
A measure of abdominal fat specifically, not overall body weight
Blood pressure
Checked as part of the same combined assessment
Blood glucose and lipids
Fasting glucose, triglycerides, and HDL cholesterol from a blood test
Why the waist-circumference cutoff differs for South Asians
This is one of the more important, and often overlooked, details in how metabolic syndrome is assessed for Indian patients.
A lower threshold, not a stricter one
- The general/Western waist-circumference threshold used in the original criteria is ≥102cm (men) and ≥88cm (women)
- For South Asians, the threshold is lower — ≥90cm (men) and ≥80cm (women) — reflecting that South Asians tend to carry more visceral (internal, abdominal) fat at a given waist size or BMI than the Western populations the original criteria were developed in
- This means a waist size that wouldn't flag as a risk factor under general/Western criteria can still be clinically relevant for a South Asian patient
- Using the correct, population-appropriate threshold is why this assessment shouldn't rely on general BMI categories alone
What metabolic syndrome means for your risk
Metabolic syndrome matters because of what it predicts, not because of how it feels — there are no symptoms from the syndrome itself.
Compared with not having metabolic syndrome, having it is associated with roughly double the risk of cardiovascular disease and roughly five times the risk of developing type 2 diabetes. This is why an assessment looks at all five criteria together rather than managing, say, blood pressure or cholesterol in isolation.
How common is metabolic syndrome in India
A systematic review and meta-analysis of studies across India found metabolic syndrome in roughly 30% of adults overall, with clear patterns by age, sex, and setting.
- Prevalence is higher in women (~35%) than men (~26%)
- Prevalence is higher in urban areas (~32%) than rural areas (~22%)
| Age group | Prevalence |
|---|---|
| 18–29 years | ~13% |
| 50–59 years | ~50% |
How we manage metabolic syndrome
There's no single medicine for metabolic syndrome as a whole — management combines lifestyle measures with targeted treatment of each individual component.
Weight loss, nutrition changes, and regular physical activity are first-line measures that can improve several criteria at once. Alongside this, blood pressure, cholesterol/triglycerides, and blood glucose are each treated to their own established targets — see our hypertension, dyslipidemia/cholesterol, obesity/weight management, and type 2 diabetes pages for detail on each.
How it’s diagnosed
Diagnosis is based on meeting three or more criteria among: waist circumference (using South Asian–specific thresholds), blood pressure, fasting glucose, triglycerides, and HDL cholesterol.
How it’s treated
Management addresses each component together — weight, blood pressure, glucose, and lipids — since treating them individually in isolation misses the underlying, connected risk.
When to seek care
- You have several individual risk factors (excess abdominal weight, high blood pressure, abnormal blood sugar or cholesterol) and haven't had a combined assessment
- A family history of type 2 diabetes or heart disease alongside excess abdominal weight
- "Borderline" blood pressure, sugar, or cholesterol readings that have never been considered together
- New chest pain, breathlessness, or other symptoms suggestive of a cardiovascular event
FAQ
What is metabolic syndrome?
It's a cluster of five measurable risk factors — abdominal obesity, high blood pressure, high triglycerides, low HDL cholesterol, and elevated blood sugar — that together raise cardiovascular and diabetes risk more than any one factor alone.
Is metabolic syndrome the same as diabetes?
No — metabolic syndrome is a cluster of risk factors that raises the risk of developing type 2 diabetes and cardiovascular disease, but it isn't diabetes itself.
What are the five criteria for metabolic syndrome?
Waist circumference, blood pressure, fasting glucose, triglycerides, and HDL cholesterol — each with its own threshold.
How many criteria do I need to be diagnosed?
Three or more of the five criteria, together, confirm a diagnosis — meeting just one or two doesn't qualify as metabolic syndrome, though it's still worth addressing.
Why is waist circumference measured instead of BMI?
Waist circumference specifically reflects abdominal (visceral) fat, which carries more metabolic risk than overall body weight — two people with the same BMI can have very different waist measurements and risk levels.
Why is the waist-circumference cutoff different for South Asians?
South Asians tend to carry more visceral fat at a given waist size or BMI than the Western populations the original criteria were developed in, so the South Asian threshold (≥90cm men, ≥80cm women) is lower than the general/Western one (≥102cm, ≥88cm).
How much does metabolic syndrome raise my risk of diabetes or heart disease?
Having metabolic syndrome is associated with roughly double the risk of cardiovascular disease and roughly five times the risk of developing type 2 diabetes, compared with not having it.
How common is metabolic syndrome in India?
A systematic review found it in roughly 30% of Indian adults overall, rising from about 13% at ages 18–29 to about 50% at ages 50–59, and more common in women and in urban areas.
Can metabolic syndrome be reversed?
Many of its components can improve significantly with sustained weight loss, nutrition changes, and physical activity, alongside treating individual components (blood pressure, lipids, glucose) to target.
Is medication needed, or is lifestyle change enough?
This depends on your specific criteria and their severity — lifestyle measures are first-line and can improve several factors at once, but individual components are also treated with medication when they don't reach target with lifestyle change alone.
Does each component need separate treatment?
Yes, generally — blood pressure, cholesterol/triglycerides, and blood glucose each have their own established treatment targets, even though they're assessed together as a cluster.
How is metabolic syndrome different from obesity alone?
Obesity is one contributor, but metabolic syndrome specifically requires meeting three or more of the five defined criteria — a person can have obesity without metabolic syndrome, or meet the criteria without a high overall BMI, particularly with central/abdominal fat distribution.
How often should I be screened for metabolic syndrome?
This depends on your individual risk factors and prior results — your care team will advise on timing suited to you, particularly if you have a family history of diabetes or heart disease or carry excess abdominal weight.
Medical disclaimer: Content on this page is for general education and is not a substitute for individualized medical advice, diagnosis, or treatment. Outcomes vary between patients. Boston Diabetes Center is outpatient / day-care specialty centre with an on-site diagnostic lab and pharmacy — no inpatient beds; imaging and inpatient care are coordinated through partner facilities.