Insulin resistance test: know your HOMA-IR

Insulin resistance often develops quietly. Your fasting insulin can rise to keep your blood sugar normal long before your glucose value itself changes, so an insulin resistance test may surface metabolic change earlier than a standalone glucose measurement.

Testing gives you a snapshot of your metabolic health. It is not a diagnosis, but a data point you can discuss with a doctor alongside your symptoms and any other values. For busy professionals, it can be an efficient way to get an early handle on signals such as ongoing fatigue or weight gain around the middle.

This test may suit people who:

• want to map their metabolic health preventively
• experience a higher risk of insulin resistance, for example through excess weight or family history
• have symptoms that might relate to blood sugar regulation, such as fatigue after eating
• want to follow a previous value over time

Would you like a broader view of your metabolism? A doctor may advise adding other markers alongside these values.

This panel measures two biomarkers in your blood and calculates a third value from them:

• Glucose (fasting): your fasting blood sugar.
• Insulin (fasting): the hormone that moves glucose into your cells.
• HOMA-IR: the calculated insulin-resistance score from the two values above.

HOMA-IR is not measured separately but derived from your fasting glucose and insulin using the formula (glucose × insulin) / 22.5. You can read more on the pages about fasting glucose and fasting insulin.

Your HOMA-IR score can say something about how sensitive your body is to insulin right now. A higher score may point towards more insulin resistance; a lower score may fit better insulin sensitivity.

Because an insulin test can vary from one moment to another, a single result is always a snapshot. A doctor therefore looks at the wider context: your glucose, your insulin, your HOMA-IR and your symptoms together.

For this test, blood is drawn at a certified sample point. There are 700+ locations across the Netherlands, which you choose yourself after ordering, at a time that suits you.

You do not need to see your GP first: this is a blood test without a referral. The draw is done by trained staff and usually takes only a few minutes.

A HOMA-IR test can be useful if you want to know preventively how your blood sugar regulation stands, or if you have symptoms you cannot quite place, such as energy dips or weight gain around the middle.

If you had an abnormal glucose or insulin test before, tracking your HOMA-IR can help you see how it develops. You always interpret the result together with a doctor.

Your result shows your fasting glucose and insulin with their reference ranges, plus your HOMA-IR with a short explanation. The HOMA index is a ratio: what counts as healthy varies by lab, age and timing, so a number on its own says little.

A higher HOMA-IR may point to more insulin resistance, but never stands alone. Only a doctor can properly interpret your result within your personal situation.

Both glucose and insulin must be measured fasting, so this test requires fasting. Do not eat or drink anything except water for 8 to 12 hours before the draw, and avoid alcohol the evening before.

Have your blood drawn in the morning where possible. Do you use medication that affects your blood sugar? Then ask your doctor whether and when it is best to measure.

Your results are available online within a few working days. You see your glucose, your insulin and your HOMA-IR with their reference ranges and a clear explanation.

Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.