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Choose where to be tested and plan around the required sampling times. The care team will coordinate your collection schedule.
Choose collection locationDiabetes · Individual laboratory test
Glucose Tolerance Test (GTT, 75 Grams)
Intel Lab's 75 g test measures fasting glucose and the response one and two hours after the drink. The clinical reason for the test determines how the readings are assessed.
Price for this test on its ownAED 250Test price AED 150
Clinical authorDr Nirupama SabhapathySpecialist Clinical Pathology
- Sample
- Plasma (NaF)
- Laboratory turnaround
- 24 hours
- Collection
- Dubai
- Laboratory
- Intel Lab
Understanding the test
What does Glucose Tolerance Test (GTT, 75 Grams) measure?
Also called Oral Glucose Tolerance (75g)
A measured glucose load can reveal a handling problem that is less apparent on a fasting sample. The reason for testing may be a pregnancy pathway or investigation of glucose control outside pregnancy.
When it may be requested
An unclear fasting result
A glucose challenge can reveal a change in handling that fasting glucose alone did not show.
A maternity assessment
A 75 g protocol may also be used in pregnancy under pregnancy-specific criteria.
Inside this test
What the laboratory looks for
In this test
- Fasting glucose
- 1-hour glucose
- 2-hour glucose
Before your sample
Prepare for collection
SpecimenPlasma (NaF)
Your checklist
Eat your usual diet in the days before testing. The test starts after an overnight fast with plain water only. Agree the fasting interval and any diabetes medicine instructions with your clinician before the appointment.
A fasting blood draw comes first, followed by the glucose drink and samples at each scheduled hour. At home the team returns for those samples. In Deira, allow for the initial draw and two hours after the drink.
Smart Report
Understanding your result
24 hoursLaboratory turnaround
Result guideGlucose Tolerance Test (GTT, 75 Grams)
Reading your result
The baseline and post-drink values have different meanings. Your clinician uses the criteria appropriate to your pregnancy status and the protocol being followed.
What can affect it
- Interpretation depends on the complete timing and the clinical protocol used.
From sample to follow-up
Your testing journey
Laboratory testGlucose Tolerance Test (GTT, 75 Grams)
- Specimen
- Plasma (NaF)
- Turnaround
- 24 hours
Open your laboratory report
Look for Glucose Tolerance Test (GTT, 75 Grams) in your report. Use the sample type and collection time when comparing it with an earlier report.
Explore Smart Report
Discuss the next step
Check that the report labels the fasting, one-hour and two-hour values. Ask which diagnostic criteria apply to your referral.
Clinical expertise
Your laboratory team
Patient questions
Before you book
How long does the Deira appointment take?
Allow time for the fasting sample and drink, then two hours for the timed draws. Pregnancy and non-pregnancy assessments use different criteria, so tell the team why the test was requested.
What happens if I cannot finish the drink?
Tell the team immediately. A partial or interrupted glucose load changes the test, and the clinician will advise whether it should be repeated.
Is 75 g the same as the pregnancy screening drink?
The 50 g screen and the fasting 75 g tolerance test use different amounts, sampling schedules and interpretation. Use the exact test specified on your referral.
Can I walk around or have coffee during the two-hour wait?
Sit quietly between samples. Leave exercise, food, coffee and smoking until the final blood draw, including when you have the test at home. If you are thirsty, ask how much plain water you may drink.
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Your next step
Glucose Tolerance Test (GTT, 75 Grams) at home.
Sources & further reading
Written by Dr Nirupama Sabhapathy, Specialist Clinical Pathology. Medically reviewed by Dr Joyce Jose, Specialist Clinical Pathology, on .
Catalogue information and AED price checked on 2 November 2026. Clinical suitability, preparation, collection arrangements and turnaround are confirmed for your selected test.