Medically Reviewed By: Dr Paul Lim – MBBS, M.Med (Int Med), MRCP (UK), FAMS (Cardiology)
Fasting Insulin Test Insulin Resistance Blood Test in Singapore
A fasting insulin blood test measures how much insulin your body is producing at rest. A raised level is an early sign of insulin resistance, which is associated with type 2 diabetes, high blood pressure and heart disease. It is a supplementary marker — one extra piece of information, read alongside the standard tests, that can be raised before fasting glucose changes.
Clinical Experience
Your Fasting Insulin Result Is Interpreted by Dr Paul Lim
Senior Consultant Cardiologist & Cardiac Electrophysiologist
Dr Paul Lim is a Senior Consultant Cardiologist who reviews your fasting insulin result in the context of your full cardiovascular risk — your blood pressure, cholesterol, weight, family history and lifestyle — and explains what it means for you and what, if anything, to do about it. He completed advanced fellowship training at Barts Heart Centre, London under Singapore’s HMDP award.
- MBBS (Singapore)
- M.Med (Int Med)
- MRCP (UK)
- FAMS (Cardiology)
- Fellow, European Society of Cardiology (FESC)
- Fellow, American College of Cardiology (FACC)
- Fellow, Heart Rhythm Society (FHRS)
What Is a Fasting Insulin Test?
A fasting insulin test measures the amount of insulin in your blood after a period without food. Insulin is the hormone that moves sugar out of your blood and into your cells for energy. When your cells stop responding well to it — called insulin resistance — your pancreas compensates by making more insulin to keep blood sugar normal.
A raised fasting insulin is one of the earliest signs of that extra workload. Because it can rise quietly over years, fasting insulin can reveal a problem while a standard fasting glucose or HbA1c still looks normal. Paired with a fasting glucose, it is also used to work out the HOMA-IR index, which gives a fuller estimate of insulin resistance.
What a Fasting Insulin Result Adds
A raised fasting insulin reflects insulin resistance, which is associated with metabolic syndrome and, over the long term, a higher risk of type 2 diabetes and heart disease. It is best thought of as a supplementary marker — it adds context to, rather than replaces, the established tests. A result may help a doctor:
- Gauge whether insulin resistance may be contributing to your metabolic picture
- Put your established results — blood pressure, weight, fasting glucose, HbA1c and a lipid panel — in context (these remain the main measures used to judge risk)
- Provide a baseline you can re-check to see whether lifestyle changes are reducing insulin resistance over time
Worth knowing: major diabetes guidelines do not recommend fasting insulin or HOMA-IR for routine risk screening — standard assessment uses fasting glucose, HbA1c, a lipid panel, blood pressure and BMI — and there is no single agreed cut-off for HOMA-IR. Fasting insulin is therefore best used as additional information in selected situations, interpreted by a doctor alongside these established tests rather than as a stand-alone heart-risk test.
The upside is that insulin resistance can often be improved through diet, exercise and weight loss, so a raised result is an opportunity to act early — for example alongside a HOMA-IR test, a CT calcium score or a full heart screening.
Who Should Have a Fasting Insulin Test?
A fasting insulin test is especially worth considering if you have:
- Central or abdominal weight, or a raised BMI
- A family history of type 2 diabetes
- Raised blood pressure, high triglycerides or low HDL cholesterol
- Borderline or impaired fasting glucose
- Polycystic ovary syndrome (PCOS), which is closely linked to insulin resistance
- A wish to understand your cardiometabolic risk as part of a thorough health check
Not sure whether the test is right for you? Dr Paul Lim can advise during a consultation and arrange it where appropriate.
What to Expect
The test itself is quick and straightforward — the main thing is to come fasted.
- Fasting is required — avoid food and sugary drinks for about 8 hours beforehand. Water and your usual medicines are generally fine; let us know what you take.
- A member of our clinical team takes a single blood sample from a vein in your arm. It takes only a few minutes.
- The laboratory measures your fasting insulin. If a fasting glucose is taken at the same time, your HOMA-IR index can also be calculated.
- Dr Paul Lim reviews the result alongside your blood pressure, cholesterol, weight, family history and lifestyle, and explains what it means for you.
- If your fasting insulin is raised, he will discuss practical steps to improve it and lower your overall cardiovascular risk.
Why Do Your Fasting Insulin Test with Us?
An Early Metabolic Signal
Fasting insulin can be raised before standard glucose tests change — a supplementary signal of insulin resistance, read alongside (not instead of) those tests.
Interpreted in Context
Dr Paul Lim explains your result alongside your established tests and overall metabolic picture — not as a stand-alone score or a number handed to you.
A Risk You Can Improve
Unlike inherited risks, insulin resistance often responds to lifestyle changes and treatment — so a raised result is a chance to act.
Track Your Progress
Because insulin resistance can change, fasting insulin can be re-checked over time to see whether your changes are working.
Transparent Pricing
Our fasting insulin and consultation fees are published below, so you know the cost before you book.
Two Locations
Available at our Jurong and Orchard clinics.
Wondering if you should check your fasting insulin? Speak with Dr Paul Lim.
Fasting Insulin Test Cost in Singapore
All fees are inclusive of GST.
| Service | Price |
|---|---|
| Test | |
| Fasting Insulin | S$66.49 |
| HOMA-IR (fasting insulin & glucose) Fasting insulin paired with fasting glucose to calculate the insulin-resistance index | S$87.20 |
| Basic Heart Check-Up Package An all-inclusive screening — includes fasting insulin/HOMA-IR, a cardiologist consultation & review, a comprehensive blood panel, a resting ECG and a treadmill stress test | S$368 |
| Consultation | |
| First Consultation with Cardiologist (Jurong) | S$130.80 |
| Follow-up Consultation with Cardiologist (Jurong) | S$98.10 |
| First Consultation with Cardiologist (Orchard) | S$272.50 |
| Follow-up Consultation with Cardiologist (Orchard) | S$163.50 |
A consultation with the cardiologist is required so the test can be properly indicated and your result interpreted in the context of your overall cardiometabolic risk.
Fasting insulin is included in our heart screening packages. Paired with a fasting glucose, it is used to calculate the HOMA-IR index, and because insulin resistance can change over time it can be repeated to track progress.
Book a Cardiologist Appointment
Contact us to schedule a consultation or to find out more about our cardiac services.
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Fasting Insulin FAQ
What is a fasting insulin test?
A fasting insulin test measures the level of insulin in your blood after a period without food. Insulin is the hormone that moves sugar out of your blood and into your cells for energy. A raised fasting insulin is an early sign that your cells are responding less well to insulin (insulin resistance), so your pancreas is having to make more of it to keep blood sugar normal.
Why does a high fasting insulin matter for my heart?
A raised fasting insulin reflects insulin resistance, which is associated with metabolic syndrome — the cluster of raised blood pressure, abdominal weight, abnormal cholesterol and high blood sugar linked to a higher risk of heart attack and stroke — and with type 2 diabetes over the long term. It can rise before fasting glucose does, but it is a supplementary marker rather than a stand-alone risk test, and is best read alongside your established results.
Who should have a fasting insulin test?
A fasting insulin test is worth considering if you carry weight around the middle or have a raised BMI, have a family history of type 2 diabetes, have raised blood pressure, high triglycerides or low HDL cholesterol, have borderline fasting glucose, or have polycystic ovary syndrome (PCOS), which is closely linked to insulin resistance. Dr Paul Lim can advise whether the test is appropriate for you.
What is the difference between fasting insulin and HOMA-IR?
Fasting insulin is a single measurement of the insulin in your blood. HOMA-IR is an index calculated from your fasting insulin together with your fasting glucose, which gives a fuller estimate of insulin resistance. Fasting insulin can be measured on its own, or paired with a fasting glucose so the HOMA-IR index can be worked out. There is no single agreed cut-off for HOMA-IR, so it is interpreted in context. Dr Paul Lim can advise which is most useful for you.
Is fasting insulin a routine or guideline-recommended test?
No. Major diabetes guidelines do not recommend fasting insulin or HOMA-IR for routine screening — standard assessment uses fasting glucose, HbA1c, a lipid panel, blood pressure and BMI. Fasting insulin is best seen as a supplementary marker in selected situations, interpreted alongside these established tests, and there is no single agreed cut-off for HOMA-IR. Dr Paul Lim can advise whether it adds anything useful in your case.
Do I need to fast for a fasting insulin test?
Yes. As the name suggests, you should avoid food and sugary drinks for about 8 hours beforehand so the result reflects your baseline insulin level. Water and your usual medicines are generally fine, but let us know what you take so we can advise. Fasting is essential for an accurate result.
How often should fasting insulin be checked?
Unlike an inherited marker, insulin resistance can change over time, so fasting insulin can be repeated to track progress. If your result is raised and you make lifestyle changes or start treatment, your cardiologist may re-check it after a few months to see whether things are improving.
Can a high fasting insulin be lowered?
Yes. Insulin resistance often responds well to changes you can make — losing excess weight, increasing physical activity, improving diet, and treating related conditions such as high blood pressure and abnormal cholesterol. Dr Paul Lim will explain what your result means and the practical steps that can help lower your overall cardiovascular risk.
How much does a fasting insulin test cost in Singapore?
At our clinic a fasting insulin test is S$66.49, inclusive of GST. A cardiologist consultation is also required (S$130.80 first / S$98.10 follow-up at Jurong; S$272.50 first / S$163.50 follow-up at Orchard, inclusive of GST). Fasting insulin is also included in our heart screening packages. See the fee table above.