19 years of experience
London, SE1 9RS
6 connections in healthcare
Dr Nicola Guess is a consultant dietitian, with >15 years experience in dietetics. Nicola splits her time between clinical practice and academic research at the University of Oxford, where she is an Advanced Fellow funded by NIHR.
She completed her clinical rotations at Baylor College of Medicine and Methodist Hospital with the University of Houston, and her PhD at Imperial College London.
Nicola's primary expertise is in conditions involving glucose homeostasis and insulin resistance including reactive hypoglycaemia, polycystic ovarian syndrome (now renamed polyendocrine metabolic ovarian syndrome), the prevention and management of type 2 diabetes, and fatty liver.
She has a particular interest in helping patients improve blood glucose, blood pressure and achieve normal cholesterol levels without relying solely on weight loss.
Nicola Is able to translate the latest research into dietary strategies for optimal health.
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Health Care and Professional Council
No. DT22808
University of Nottingham
Human Nutrition
Graduated 2000
Florida International University
Public Health
Graduated 2006
University of Houston
Dietetics
Graduated 2007
Imperial College London
Clinical Research in Prediabetes
Graduated 2014
PhD Doctorate in Diabetes Prevention
MPH Master of Public Health
RD Registered Dietitian (HCPC)
Current:
NIHR Advanced Fellow
Past:
National Institute for Health and Care Excellence Scholar
Diabetes UK Allied Health Professional Fellow
Winston Churchill Travel Fellow
Fulbright Scholar
Read publications and papers written by this specialist.
09 / 03 / 2026
Hyperinsulinaemia as a cause of obesity and cardiometabolic diseases - PubMed
Published in Nat Rev Endocrinol.
15 / 11 / 2023
Amino acid-stimulated insulin secretion: a path forward in type 2 diabetes - PubMed
Published in Journal of Amino Acids
13 / 08 / 2024
Manipulation of Post-Prandial Hyperglycaemia in Type 2 Diabetes: An Update for Practitioners - PubMed
Published in Diabetes Metab Syndr Obes
01 / 05 / 2026
Characterising the impact of shift work on diet and glucose variability in healthcare employees living with type 2 diabetes: The Shift-Diabetes study - PubMed
Published in Diabetic Medicine
New appointment
£220Follow-up appointment
£9524-26 St Thomas Street, London Bridge, London, United Kingdom, SE1 9RS
Very knowledgeable dietitian - happy with service but quite expensive compared to others.
Very happy with the reassurance and simple advice about my glucose levels and what I should be doing ( not diabetic)
Most knowledgable dietitian I have seen. Competent, clear and very helpful!
Recently had a health check which showed elevated cholesterol and blood sugar. Really not keen on medication so wanted some diet advice. Glad I did. Nicola‘s advice is very clear and practical with a number of options of what I can do if I’m travelling or not able to prepare food at home.
Very clear advice with actionable tips that don’t seem too onerous!
I got some solid advice on a low carbohydrate diet and triathlon training. Very happy and useful to see someone who knows how to interpret a continuous glucose monitor.
I’ve got really bad insulin resistance even though I’m slim and active. I also recently found that I have a fatty liver that confused both my doctors and me. I was really happy that Nicola was able to provide some insight into what I can do for my diet. However, I would’ve liked more time to go through practical things like meal planning and it didn’t feel like we had a chance to cover it properly. I would have preferred a longer appointment so we had a chance to discuss what was wrong, give me a chance to answer the questions and then move onto the practical side of things. Overall though I am happy that at least I have some understanding of what’s going on and what I can do about it. I’ll be having a follow-up MRI in three months so I’ll be able to see how well it worked.
I saw Nicola to get the right diet for my polycystic ovarian syndrome. It’s now three months in and things are going well. I’ve lost 3 kg which isn’t quite as much as I wanted but happily my symptoms are improving, my menstrual cycle is getting more regular and my skin is clearing up. I have found that the low carbohydrate approach really works for me because it helps reduce insulin levels.
I got a CGM recently following a midlife health checkup. I wanted to see Nicola because I thought my glucose looked strange and I was worried about my peaks and crashes. I have Diabetes in my family and wanted to do everything to reduce my risk. Nicola talked me through what my readings mean and gave me a couple of dietary and exercise tips to follow. Overall it was pretty reassuring and I feel happy that the lifestyle that I follow is on the right track.. I’ve been following the advice for about a week and I can see that my dips aren’t as low as they were, but my glucose during the night is lower which I’m assured are all good things! Highly recommend!

Explore videos from Dr Nicola Guess explaining process of procedures and other important things you should know before choosing your provider.

An introduction to my background, research and clinical interests!
28 July 2026

In this video, I discuss the common misconception that limiting glucose spikes prevents type 2 diabetes. I explain that elevated glucose as a symptom of underlying pathophysiology of beta-cell dysfunction and insulin resistance. Overwhelmingly the evidence demonstrates the best way of fixing the underlying pathophysiology is weight loss, even modest weight loss; and remaining physically active. There are also a couple of dietary aspects which can be modified to reduce the risk of type 2 diabetes independent of weight loss or physical activity and these include increasing fibre and reducing sugar-sweetened beverages. The reason clarifying this Is important is because I see people doing stuff like adding Greek yoghurt to fruit which is just adding unnecessary calories to healthy foods…..
19 August 2026
youtube.com

One of the most common questions I get asked!Here I explain why b...One of the most common questions I get asked! Here I explain why bananas are not harmful despite the fact they cause blood glucose to go up. Outside of diabetes, we don’t have solid evidence that glucose per se is causing harm. In prediabetes the clinical goal should be fixing the underlying pathophysiology - mostly this is about weight loss and physical activity; However, there are some nutritive components that seem to fix the underlying pathophysiology independent of weight and exercise and that includes the resistant starch which is in foods like bananas!! For people who have diabetes – where the evidence is rock solid that glucose reaches a concentration which causes direct harm - people may want to limit their carbohydrate, which can include reducing intake of food like bananas. However, bear in mind that diabetes isn’t just about glucose and bananas have a bunch of goodness in them which is going to help lower blood pressure and blood lipids as part of a healthy diet.
22 August 2026
youtube.com
What are Dr Nicola Guess's reviews like?
Dr Nicola Guess's overall patient rating is 4.93 out of 5 stars on Doctify. This is based on 14 reviews.
What languages does Dr Nicola Guess speak?
Dr Nicola Guess speaks English
Where is Dr Nicola Guess located?
Dr Nicola Guess primarily practices at Keats House, located at 24-26 St Thomas Street, London Bridge, London, United Kingdom, SE1 9RS
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What are Dr Nicola Guess working hours?
Dr Nicola Guess is working Friday (09:00 - 17:00), Saturday (09:00 - 14:00)
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Does Dr Nicola Guess accept new patients?
Dr Nicola Guess generally accepts new patients.
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