Insulin Fasting, 1 Hour & 2 Hours
This multi-point insulin test measures insulin at fasting, 1-hour, and 2-hour intervals after a glucose load. It provides a detailed picture of your body's insulin secretion and resistance patterns.
- DHA-licensed lab
- Includes Doctor Consultation
- Physician-reviewed
- Same Day Collection
24 hours
Turnaround
Blood
Sample
What the Insulin Fasting, 1 Hour & 2 Hours test tells you
This is a dynamic test rather than a single measurement. You arrive fasting, blood is taken as a baseline, you drink a measured glucose solution, and further samples are taken at one hour and at two hours. What emerges is not a number but a shape: the trajectory your insulin follows when the pancreas is asked to deal with a defined sugar load. Because it involves staying at the facility for the whole procedure with repeated draws, it is a more demanding appointment than an ordinary blood test, and it is worth planning your morning around it.
The shape is what carries the information. A healthy pancreas releases a prompt early surge of stored insulin, then a slower sustained second phase, and insulin falls back as glucose is cleared. In insulin resistance the tissues respond poorly, so the pancreas compensates by producing far more hormone than the load should require, and the whole curve sits high. In beta-cell decline the early surge is blunted or delayed and the peak arrives late. These two patterns can accompany very similar glucose results while calling for quite different clinical thinking, which is the main reason serial insulin sampling is requested.
Two cautions belong with this test. Insulin measurement is not how diabetes is diagnosed (that rests on glucose and HbA1c), and this series adds information about insulin resistance and unusual presentations alongside those tests rather than in place of them. And if you already take injected insulin, your measured insulin includes the hormone you administered, which the assay cannot separate from your own; C-peptide is the measurement used in that situation, because it is released by the pancreas in step with its own insulin and is not present in injected preparations.
Recommended for detailed assessment of insulin resistance, PCOS evaluation, or when standard glucose tests are borderline and more information is needed.
- Shows the whole curve
Three timed samples reveal whether insulin arrives promptly, late, in excess or insufficiently: a pattern that no single fasting measurement can show.
- Separates two problems
Insulin resistance and failing insulin production can produce similar glucose results but demand different thinking, and this series distinguishes them.
- Clarifies PCOS assessment
Insulin resistance is central to polycystic ovary syndrome, and a dynamic profile characterises it more fully than a fasting value alone.
- Explains borderline results
When glucose tests sit in an ambiguous zone, the insulin response often explains why, and helps your doctor decide what to do next.
Reasons your doctor may request the Insulin Fasting, 1 Hour & 2 Hours test
Your doctor may order this test for any of the reasons below. Some are routine checks, others follow specific symptoms or an earlier result.
Borderline or inconsistent glucose
- Your glucose tests are borderline or inconsistent and your doctor wants to understand the insulin response behind them.
- A distinction between insulin resistance and reduced insulin production is needed to guide management.
PCOS & metabolic risk
- You are being assessed for polycystic ovary syndrome, where insulin resistance is frequently the underlying driver.
- You have marked metabolic risk (central obesity, fatty liver, raised triglycerides) and a detailed assessment is warranted.
Symptoms after eating
- You have episodes of light-headedness, sweating or shakiness some hours after eating, and the insulin response is being examined.
Your report presents this as a Multi-parameter panel rather than one figure: insulin fasting, then again after the glucose drink. The shape across the time points is what carries the meaning, and every value is read beside the glucose drawn at the same moment. A prompt early rise that settles back as glucose clears is the expected pattern. A curve that sits high throughout suggests insulin resistance, where the pancreas produces far more hormone than the load should require: common with abdominal and liver fat, polycystic ovary syndrome, and corticosteroid or antipsychotic treatment. A blunted or delayed early rise with a late peak points instead to declining pancreatic output. Injected insulin is measured together with your own and lifts every point, which is why C-peptide is used in that situation. Your doctor interprets the pattern with your symptoms and history.
Medically reviewed by Dr Nirupama Sabhapathy
This test is reported descriptively rather than on a numeric scale: each finding below explains what your report may say.
Insulin is measured fasting and after a glucose load. The pattern across time points is interpreted together. See your detailed report.
Ranges are a guide: your physician interprets your result alongside your symptoms and history.
What a higher result can point to
- Insulin resistance, in which the pancreas produces far more hormone than the glucose load should require.
- Excess body fat, particularly abdominal and liver fat, which reduces the tissues' response to insulin.
- Polycystic ovary syndrome, commonly associated with an exaggerated insulin response.
- Corticosteroids, some antipsychotics and certain other medications that impair insulin action.
- Injected insulin, which the assay cannot distinguish from the body's own and which inflates every time point.
- Rarely, an insulin-secreting tumour, which produces inappropriately high insulin across the series.
What a lower result can point to
- Reduced insulin production from beta-cell decline, as in type 1 diabetes or long-standing type 2 diabetes.
- Damage to the pancreas from chronic pancreatitis, cystic fibrosis or pancreatic surgery.
- A blunted or delayed early insulin surge, an early feature of type 2 diabetes even when later samples look adequate.
- Prolonged fasting, severe undernutrition or substantial recent weight loss.
- Adrenal or pituitary insufficiency, which reduces the drive to secrete insulin.
These are possibilities, not diagnoses. A single value outside the reference range is interpreted alongside your symptoms, history and other tests: your doctor decides what it means for you.
What this test cannot tell you
- Insulin measurement does not diagnose diabetes; diagnosis rests on glucose and HbA1c, and this series supplements those tests rather than replacing them.
- Insulin assays are not standardised between laboratories, so results and patterns are best compared within a single laboratory.
- In anyone taking injected insulin the result reflects both administered and self-produced hormone, so C-peptide is the appropriate test instead.
- The response varies with recent diet, activity, sleep and illness, so an unusual pattern may need repeating before it is acted upon.
Risks of the blood draw
- Mild bruising or brief soreness where the needle went in.
- Occasional lightheadedness, which settles after a few minutes of rest.
- Bleeding or infection at the site, which is rare with sterile single-use equipment.
- 1This is a timed, multi-draw procedure: you fast, give a baseline sample, drink a measured glucose solution and are sampled again at one hour and two hours.
- 2You must stay at the facility throughout, resting, with nothing but plain water between samples.
- 3The pattern across the three points matters more than any single value.
- 4It supports assessment of insulin resistance and unusual presentations, but diabetes itself is diagnosed from glucose and HbA1c.
- 5If you take injected insulin, tell the team: C-peptide is the measurement that works in that situation.
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Frequently Asked Questions
Everything you need to know about the Insulin Fasting, 1 Hour & 2 Hours test. Can't find what you're looking for?
Talk to our team→The expected pattern is a prompt early rise in insulin after the glucose drink that settles back as glucose clears. Your report shows insulin fasting, at 1 hour and at 2 hours, and each value is read beside the glucose drawn at the same moment. The shape across the three points carries more meaning than any single number.
A curve that sits high throughout suggests insulin resistance: the pancreas is producing far more hormone than the glucose load should require. It is common with abdominal and liver fat, polycystic ovary syndrome, and corticosteroid or antipsychotic treatment. Rarely, an insulin-secreting tumour produces this picture. Injected insulin also lifts every point, so mention it.
A blunted or delayed early rise with a late peak points towards declining pancreatic output. It can be an early feature of type 2 diabetes even when later samples look adequate. Consistently low values are seen in type 1 diabetes, long-standing type 2 diabetes and pancreatic damage. Your doctor reads the pattern with your glucose and HbA1c.
Set aside the whole morning. After an overnight fast you give a baseline sample, drink a measured glucose solution, and are sampled again at one hour and two hours. You stay at the facility throughout, resting, with nothing but plain water between samples, because walking about distorts the insulin response.
Polycystic ovary syndrome is commonly associated with an exaggerated insulin response, and that excess insulin can contribute to the hormonal picture. Showing the full curve helps your doctor judge how much insulin resistance is involved, especially when standard glucose tests are borderline and more information is needed.
Because the timing of the insulin response is the point. One value tells you how much insulin was present at that instant, whereas three tell you whether it arrived promptly, arrived late, overshot, or never really came, and those patterns lead in different clinical directions.
No. Diabetes is diagnosed from glucose measurements and HbA1c. This series adds information about insulin resistance and about unusual or hard-to-classify presentations, and your doctor reads it alongside those tests rather than instead of them.
Not reliably. The assay measures insulin in your blood without distinguishing the hormone you injected from the hormone your pancreas made. C-peptide is used instead, because the pancreas releases it in step with its own insulin and it is not present in injected preparations.
It generally suggests your pancreas is compensating: glucose is being held at an ordinary level, but only because the tissues are being driven with an unusually large amount of insulin. This is one of the recognised early states on the path toward type 2 diabetes, and it is a finding to discuss with your doctor rather than a diagnosis in itself.
Yes. Fast for eight to twelve hours overnight with plain water only, no tea, coffee, juice, gum or smoking. Eat normally, without cutting carbohydrates, for several days beforehand, and avoid alcohol and strenuous exercise the evening before.
The insulin response test is AED 120, including a physician-reviewed report, with results usually within 24 hours. Home collection anywhere in Dubai is free when your order reaches AED 300 or includes a package; below that, a AED 100 home collection fee applies (AED 50 for a lab walk-in).