London Medical Diabetes
Glucose tolerance test
London Medical provides the most up-to-date procedures for patients – with clinics held by some of the UK’s most renowned specialists.
Comprehensive clinical testing to help you lose weight and safeguard your health
The Oral Glucose Tolerance Test or OGTT can test how well your body can deal with the carbohydrates in your diet. The test is more accurate than simple finger prick testing and allows the weight management specialists at London Medical to identify diabetes, prediabetes and insulin resistance at an early stage.
Having tests can be worrying, but the expert staff at London Medical will be on hand to offer support and guidance throughout. By determining whether your body has difficulty metabolising the sugars in your diet, they can target a treatment programme to your individual needs and help you achieve the very best weight loss results.
What is a Glucose Tolerance Test?
An oral glucose tolerance test or OGTT is a test in which your blood glucose levels are measured before taking a sugary drink, and again at fixed intervals afterwards. The test can be used to diagnose diabetes and show if you have impaired glucose tolerance or prediabetes, which are both closely linked to obesity.
Glucose Tolerance Test at London Medical
The glucose tolerance test will take place in the comfort and discretion of London Medical’s outpatient clinic. It’s a straightforward, painless process but it lasts for 2 hours so you should allow an additional hour in total. The clinic’s supportive staff will be on hand to answer your questions or concerns, every step of the way.
What to expect during a Glucose Tolerance Test
- You will usually be asked to stay off food and only take clear unsweetened drinks from midnight the night before the test.
- The clinic staff will take a blood sample and measure your blood glucose level before you start the test, it’ll give an indication of your sugar levels when you’re fasting.
- You’ll be asked to drink a sweet glucose drink.
- A member of the team will check your blood after this sugar load, to see how your body has responded. Samples will then be taken at regular intervals to monitor the blood glucose level over time. The clinic staff will give you precise details of the schedule for your test, so that you know exactly what to expect.
Frequently Asked Questions
Our Consultants
Dr Ralph Abraham
Dr Ralph Abraham, a founder of London Medical, specialises in diabetes, weight management, endocrinology and cholesterol.
Dr Rakesh Amin
Clinical lead for endocrinology and diabetes at Great Ormond Street Hospital. His clinical practice encompasses all areas of paediatric and adolescent endocrinology and diabetes.
Dr David Cavan
An experienced consultant endocrinologist with expertise in all areas of diabetes management.
Dr Harvinder Chahal
With a focus on adults, Dr Chahal is a consultant in endocrinology, diabetes, bariatric medicine, and general internal medicine at Imperial College Trust.
Dr Claire Chalmers-Watson
Dr Chalmers-Watson is an experienced General Practitioner with over two decades of experience in primary care and a profound expertise in managing a broad spectrum of health conditions.
Dr Mimi Z. Chen
Specialist consultant in diabetes and endocrinology with a particular interest in weight loss and weight management medications.
Professor Pratik Choudhary
Consultant in diabetes with a special interest in type 1 and technology to manage it.
Dr Ling Ling Chuah
Consultant endocrinologist with over a decade’s experience in the treatment of diabetes.
Dr Andrew Frankel
Consultant nephrologist who specialises in the management of people with both chronic kidney disease and diabetes.
Ms Symone Genevezos
A passionate and dedicated dietitian offering nutrition and support for clients of all ages.
Our Locations
London Medical is located in the Harley Street medical area. Together with top experts across a range of multi-disciplinary fields, we offer the finest facilities for your care, all under one roof.
Monday to Friday 8.30am to 8pm
Monday to Friday 8.30am to 8pm
Monday to Friday 8.30am to 8pm
Speak to a member of our team
Contact the appointments team
If you have any questions or want to book an appointment, please speak to our team on +44 (0)800 0483 330.
If you wish to book online, for private GP appointments, please use our GP appointment form.
Or, make an enquiry online using this form and one of our team will be in touch. Please note, all the information collected is required as part of our registration process. By using this form you agree with the storage and handling of your data by our team. You don't need a referral from your GP to make an appointment with us.