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Intel Lab Diagnostics Dubai
Single Biomarker

Insulin, 1 Hour, Glucose-75 g

1-Hour Insulin (75g Load)

This test measures insulin levels one hour after a 75-gram glucose load. It helps assess how vigorously your pancreas responds to sugar and identifies early insulin resistance.

BLOOD24 HOURSFASTING
AEDAED155
  • Free home collection
  • Physician-reviewed report

24 Hours

Turnaround

Blood

Sample

About This Test

What the Insulin, 1 Hour, Glucose-75 g test tells you

This test measures your insulin one hour after you drink the standard 75-gram glucose load. It is a dynamic procedure rather than a simple blood test: you arrive fasting, the glucose solution is given, and you remain at the facility until the timed sample is taken. The one-hour point is chosen deliberately, because it sits close to where the insulin response should be at its most vigorous, and therefore says more about the pancreas at work than a resting measurement can.

What the sample captures is the early insulin surge. A healthy pancreas holds a reserve of ready-made insulin and releases it quickly when glucose rises, blunting the peak before the slower, newly manufactured second wave arrives. An unusually large one-hour insulin value usually means that surge is having to be enormous to achieve an ordinary effect: the signature of insulin resistance, in which tissues respond poorly and the pancreas compensates. A disproportionately small value points the other way, toward a pancreas that is losing its capacity to mount that early release, which is one of the first measurable changes on the path to type 2 diabetes.

The result is read alongside the glucose measured at the same moment, because insulin without its matching glucose is close to uninterpretable: a given insulin level means one thing if glucose is high and something quite different if glucose is ordinary. Two caveats apply throughout. Insulin measurement is not the route to a diabetes diagnosis, which rests on glucose and HbA1c, and anyone taking injected insulin cannot be assessed this way: the assay cannot separate injected hormone from the body's own, so C-peptide is used instead.

Sample type
Blood
Measured in
µIU/mL
Turnaround
24 Hours
Fasting
Required
Best for
Adults at metabolic risk
Why Get Tested?

Used alongside glucose tolerance testing to characterise insulin dynamics and differentiate between various stages of metabolic dysfunction.

  • Captures the early surge

    The one-hour sample lands near the height of the insulin response, showing how vigorously the pancreas reacts to a standardised sugar load.

  • Detects compensating resistance

    A very large insulin response to an ordinary load suggests the tissues are responding poorly and the pancreas is working hard to conceal it.

  • Flags early beta-cell decline

    A disproportionately small early response can indicate that the pancreas is beginning to lose its reserve, often before glucose tests change.

  • Interpreted with matching glucose

    Paired with the glucose from the same time point, it distinguishes an appropriate insulin response from an excessive or inadequate one.

When This Test Is Ordered

Reasons your doctor may request the Insulin, 1 Hour, Glucose-75 g 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.

  • Part of a glucose tolerance test

    • You are undergoing glucose tolerance testing and your doctor wants the insulin response characterised as well as the glucose.
    • Your glucose results are ambiguous and the insulin response may clarify whether resistance or reduced secretion is the issue.

  • PCOS & metabolic risk

    • You are being assessed for polycystic ovary syndrome, where an exaggerated insulin response is common.
    • You have significant metabolic risk factors such as central obesity or fatty liver disease despite acceptable glucose results.

  • Low blood sugar after eating

    • You experience symptoms of low blood sugar in the hours after eating and the early insulin response is being examined.
Preparation
The short version
A little prep.
  • Blood
  • Free home collection
  • Fasting required
  • Results in 24 Hours
  1. 1
    Book any time

    Pick a morning slot online or on WhatsApp: come fasted per the prep note below.

  2. 2
    We come to you

    A DHA-licensed nurse collects your sample at home or in the office: free home collection.

  3. 3
    Results in 24 Hours

    A physician-reviewed, easy-to-read report lands securely by WhatsApp and email.

Prep note
Physician reviewed

Eat normally, without restricting carbohydrates, for several days beforehand, then fast overnight for eight to twelve hours with plain water only: no tea or coffee, no juice, no chewing gum or mints, and no smoking.

Allow time in your morning: after the glucose drink you must remain at the facility, resting, until the one-hour sample is taken, and the timing runs from your first sip. Walking, exercise and smoking during the wait all alter both glucose clearance and the insulin response, so stay seated and take nothing but water.

Avoid alcohol and strenuous exercise the evening before. Bring your full medication and supplement list and flag corticosteroids and any diabetes treatment.

Tell the team before the test begins if you take injected insulin, if you have had bariatric or other upper gastrointestinal surgery, or if you have been unwell recently.

Understanding Your Results

The one-hour sample, reported in µIU/mL, is read beside the glucose drawn at the same moment. A result in the Normal band means your pancreas produced the early surge expected for the amount of sugar it was given. A High result usually means that surge had to be far larger than the load should require: the signature of insulin resistance, where tissues respond poorly and the pancreas compensates. Excess abdominal and liver fat, polycystic ovary syndrome, corticosteroids and some antipsychotics all push it up, as does rapid stomach emptying after bariatric surgery; injected insulin is measured together with your own and inflates the figure, which is why C-peptide is used instead. A value at the low end alongside rising glucose points the other way, to an early surge the pancreas can no longer mount. Your doctor interprets the response with your glucose, symptoms and history.

SmartReport
80
Healthy zone40µIU/mLNormal
Reference ranges · µIU/mL
Normal
Expected post-load insulin response.
0–80
High
Exaggerated response: may indicate insulin resistance.
81–300

Ranges are a guide: your physician interprets your result alongside your symptoms and history.

Reading a High or Low Result

  • What a higher result can point to

    • Insulin resistance, in which a large early surge is needed to produce an ordinary glucose effect.
    • Excess body fat, especially abdominal and liver fat, which blunts the tissues' response to insulin.
    • Polycystic ovary syndrome, frequently accompanied by an exaggerated early insulin release.
    • Medications that impair insulin action, including corticosteroids and some antipsychotics.
    • Injected insulin, which is measured together with the body's own and inflates the result.
    • Rapid stomach emptying after bariatric surgery, which provokes an unusually brisk early insulin release.

  • What a lower result can point to

    • Declining beta-cell function, which reduces the reserve of ready-made insulin available for the early surge.
    • Type 1 diabetes or advanced type 2 diabetes, in which insulin production is substantially reduced.
    • Pancreatic damage from chronic pancreatitis, cystic fibrosis or pancreatic surgery.
    • Prolonged fasting, marked recent weight loss, or severe undernutrition before the test.
    • Adrenal or pituitary insufficiency, which reduces the hormonal 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.

Limitations & Safety

What this test cannot tell you

  • Insulin is not the basis for diagnosing diabetes; glucose measurements and HbA1c are, and this test contributes supporting information about insulin resistance and unusual presentations.
  • The value means little without the glucose measured at the same moment, since the same insulin level can be appropriate or excessive depending on the glucose it accompanies.
  • It cannot be interpreted in anyone taking injected insulin, because the assay does not distinguish administered hormone from the body's own; C-peptide is used instead.
  • Insulin assays differ between laboratories and there is no universally agreed interpretation of one-hour insulin, so results are best compared within a single laboratory.

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.
Key Points
  • 1You fast overnight, drink the measured 75-gram glucose solution, and stay at the facility until the timed one-hour sample is taken.
  • 2The sample reflects the early insulin surge: how promptly and how forcefully the pancreas responds to a sugar load.
  • 3It is read together with the glucose from the same time point, never on its own.
  • 4Diabetes is diagnosed from glucose and HbA1c; this test adds information about insulin resistance rather than making the diagnosis.
  • 5If you take injected insulin, tell the team beforehand: C-peptide is the appropriate measurement in that case.
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Frequently Asked Questions

Everything you need to know about the Insulin, 1 Hour, Glucose-75 g test. Can't find what you're looking for?

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A fasting value shows the baseline the pancreas maintains at rest, whereas the one-hour sample shows how it performs under a standardised challenge. The early surge is often the first part of the response to change, so a resting measurement can look unremarkable while the dynamic response is already abnormal.