Glucose Tolerance Test/OGTT
Private OGTT in London using four timed blood draws after a glucose drink. Send us an enquiry so the extended appointment can be arranged correctly.
Turnaround time
1 business day
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1
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Overview of the Glucose Tolerance Test/OGTT Test
The Glucose Tolerance Test, commonly called an OGTT, is a dynamic metabolic test used to assess how the body handles a controlled glucose challenge over time.
Unlike a single fasting Glucose measurement, an OGTT follows the blood glucose response after a measured glucose drink.
The London Blood Tests pathway for this test uses four timed blood draws.
Each sample must be collected at the correct stage of the test, making this a longer and more structured appointment than routine phlebotomy.
The test is therefore not booked through an ordinary blood-test slot.
Please send us an enquiry for the Glucose Tolerance Test so that the four-draw appointment can be arranged correctly.
The laboratory component has an approximate one-day turnaround once the complete timed sample set has been received. The Glucose Tolerance Test OGTT costs £207.
What Does the Glucose Tolerance Test/OGTT Test Check?
The OGTT assesses the blood Glucose response following a controlled oral glucose challenge. This test measures 1 specialist dynamic investigation across 4 timed blood draws.
Glucose Tolerance Test / OGTT
Measures how blood Glucose changes following a controlled glucose drink using four timed blood collections arranged through London Blood Tests.
Who May Benefit From the Glucose Tolerance Test/OGTT Test?
An OGTT may be useful when more detailed assessment of glucose regulation is required than a fasting Glucose or HbA1c result alone can provide.
People with borderline blood Glucose results - Dynamic testing can provide information about how Glucose is handled after a controlled challenge.
People with conflicting Glucose and HbA1c findings - An OGTT may provide additional metabolic information.
People undergoing investigation of impaired glucose tolerance - Timed measurements allow the Glucose response to be assessed.
People specifically advised by a clinician to undergo an OGTT - The test is often used within structured metabolic investigation.
People who require a dynamic rather than static Glucose assessment - Several samples are collected over the testing period.
How to Prepare
Do not eat during the testing period unless instructed by the clinical team.
The glucose drink and timed samples must follow the arranged protocol for the result to be meaningful.
Symptoms and Reasons to Consider the Glucose Tolerance Test/OGTT Test
An OGTT is generally arranged because of previous results, risk factors or a clinician's recommendation rather than symptoms alone.
Borderline fasting Glucose - Further dynamic assessment may be useful.
Previous abnormal glucose screening - An OGTT can provide additional information.
Strong metabolic or diabetes risk factors - More detailed glucose investigation may be recommended.
Symptoms associated with abnormal Glucose regulation - Persistent thirst, frequent urination or unexplained weight change warrant appropriate assessment.
A clinician has requested glucose tolerance testing - The test follows a controlled timed protocol.
Severe hyperglycaemic symptoms, vomiting, dehydration, confusion or acute illness requires appropriate medical review rather than routine outpatient OGTT testing.
How to Book Your Glucose Tolerance Test/OGTT Test
The OGTT requires an extended timed appointment and cannot be treated as a standard short blood draw.
Choose the Glucose Tolerance Test/OGTT
Send London Blood Tests an enquiry requesting the test.
Select your collection
Send an enquiry to arrange all four timed blood draws at the designated clinic. The test price is separate from the standard +£35 in-clinic collection charge, where applicable.
Attend your appointment
Arrive fasting and follow the glucose-drink and timed collection instructions.
Laboratory analysis
Four timed specimens are collected through the London Blood Tests pathway and submitted for Glucose analysis.
Receive your results securely
Your completed OGTT report is returned securely.
When Will I Receive My Results?
The analytical turnaround is approximately 1 day after the complete timed specimen set enters laboratory processing.
The appointment itself takes considerably longer than an ordinary blood draw.
Laboratory turnaround and appointment duration are therefore separate.
Understanding Your Results
The result shows how blood Glucose changes after the controlled oral glucose challenge.
Interpretation depends on the timed measurements and clinical reason for testing.
Results may be considered alongside fasting Glucose, HbA1c, medication and wider metabolic history.
An abnormal OGTT result should be reviewed by an appropriate clinician.
One result should not be interpreted without considering the testing protocol and the circumstances in which the samples were collected.
Why Book With London Blood Tests?
London Blood Tests provides OGTT testing through a structured extended appointment pathway.
Four timed blood draws - The London Blood Tests protocol follows Glucose across four collections.
Extended appointment - Appropriate time is reserved for the full dynamic test.
Clear fasting preparation - Instructions are supplied before attendance.
Controlled glucose challenge - Sampling is coordinated around the glucose drink.
Professional blood collection - Timed samples are taken by trained healthcare staff.
Private results - Your completed laboratory report is delivered securely.
Private Glucose Tolerance Test/OGTT in London
London Blood Tests provides private OGTT testing in London using four timed blood draws.
Because the test requires fasting, a glucose drink and carefully timed sampling, please send us an enquiry rather than booking a routine blood-test slot.
Laboratory analysis is generally completed approximately one day after the full sample series reaches the laboratory.