David Unwin
National Health Service (NHS)
David Unwin is a general practitioner working within the National Health Service (NHS). His work focuses on metabolic health and the management and remission of type 2 diabetes through dietary interventions. His published research investigates the clinical applications and safety of ketogenic and low-carbohydrate diets, intermittent fasting, insulin resistance, and their effects on obesity, hypertension, and nonalcoholic fatty liver disease.
52 claims checked on air: 3 context 1 overstated 30 supported 18 unverified 1 flagged
What they said on air - unverified
3 citing their own research
UK government figures show that each year of poorly controlled type 2 diabetes reduces life expectancy by approximately 100 days.
"So, we know from get government figures, UK government figures, that for every year that you have poorly controlled type 2 diabetes, you're losing 100 days of life." (said at 0:05:24)
No published record matching the claim that UK government figures show each year of poorly controlled type 2 diabetes reduces life expectancy by approximately 100 days was located; this does not prove the claim false.
In Dr. David Unwin's clinical practice cohort, 93% of patients with prediabetes achieved normal blood glucose levels following a low-carbohydrate diet.
"Well, I can tell you that the people with pre-diabetes in my practice north of Liverpool, 93% of them will get a completely normal blood sugar if they go low carb. 93% resolution and that will last for years because I've checked." (said at 0:13:10)
No published record matching the claim that 93% of patients with prediabetes achieved normal blood glucose levels following a low-carbohydrate diet in Dr. David Unwin's clinical practice cohort was located; this does not prove the claim false.
In Dr. David Unwin's initial low-carbohydrate patient cohort in 2013, patients with chronically abnormal liver function saw their liver enzyme levels improve by 33% to 50% within weeks.
"And they'd had abnormal liver function for 10 years, and suddenly within weeks the liver function was improving, often by a third or 50%." (said at 0:26:05)
No published record matching Dr. David Unwin's specific report of a 33% to 50% improvement in liver enzymes within weeks among patients with chronically abnormal liver function was located; this does not prove the claim false. Published service evaluations from Dr. Unwin's general practice cohort (such as Unwin et al., BMJ Nutrition, Prevention & Health 2020) report substantial improvements in glycemic control (HbA1c), body weight, blood pressure, and lipid markers following a lower-carbohydrate diet, but specific short-term liver enzyme outcome data matching these exact percentages were not documented in the indexed literature.
A standard bowl of plain cornflakes has a glycemic load equivalent to approximately 8 four-gram teaspoons of sugar.
"So, the cornflakes is one, two, four, five, six, seven, and eight. One, two, three, four, five, six, seven, eight." (said at 0:42:07)
No published record matching the claim that a standard bowl of plain cornflakes has a glycemic load equivalent to approximately 8 four-gram teaspoons of sugar was located; this does not prove the claim false.
A large baked potato has a glycemic load equivalent to approximately 9 four-gram teaspoons of sugar.
"The potato, obviously it depends on its size. That's quite a big one. So, that one is one, two, three, four, and there's more. Five, six, is nine. There they go. Nine." (said at 0:42:37)
No published record matching the claim that a large baked potato has a glycemic load equivalent to approximately 9 four-gram teaspoons of sugar was located; this does not prove the claim false.
A standard chocolate bar contains the equivalent of approximately 7 to 7.5 teaspoons of sugar.
"That chocolate bar is actually—you could do it for me. Is seven and a half. So, you can give it seven." (said at 0:43:09)
No published record matching the claim that a standard chocolate bar contains approximately 7 to 7.5 teaspoons of sugar was located; this does not prove the claim false.
A large ripe banana has a glycemic impact equivalent to approximately 6 four-gram teaspoons of sugar.
"A ripe banana has more sugar in it as you probably know when you eat it. But let's say that banana is quite a ripe one. It looks quite ripe. Let's say that's six cuz it's a big banana." (said at 0:43:39)
No published record matching the specific claim that a large ripe banana produces a glycemic impact equivalent to approximately six 4-gram teaspoons of table sugar was located; this does not prove the claim false.
The Public Health Collaboration charity was co-founded by Dr. David Unwin and Dr. Rangan Chatterjee.
"The Public Health Collaboration is a charity I helped set up with Dr. Rangan Chatterjee 10 years ago." (said at 0:44:10)
No published record matching the claim that the Public Health Collaboration charity was co-founded by Dr. David Unwin and Dr. Rangan Chatterjee was located; this does not prove the claim false.
The Public Health Collaboration's sugar infographic charts have been translated into 35 languages.
"These infographics, there are actually far more than this. This is the seven more. They're available in 35 languages. Volunteers have translated this to go all over the world." (said at 0:44:33)
No published record matching the claim that the Public Health Collaboration's sugar infographic charts have been translated into 35 languages was located; this does not prove the claim false.
A bar of 90% dark chocolate contains only approximately two teaspoons of sugar.
"If you eat 90% dark chocolate, there's only about two teaspoons of sugar in a bar." (said at 0:47:47)
No published record matching the claim regarding the exact sugar content of a 90% dark chocolate bar was located; this does not prove the claim false.
White chocolate is typically composed of approximately 70% to 80% sugar.
"So, white chocolate is like 80% white sugar? [0:47:47] GUEST1: Yeah. [...] HOST: Okay, so white chocolate is basically like 70-odd percent just pure white sugar. [0:48:19] GUEST1: Yeah. And nobody knows." (said at 0:47:47)
No published record matching the claim that white chocolate is composed of 70% to 80% sugar was located; this does not prove the claim false.
A small slice of brown bread has a glycemic impact equivalent to approximately three teaspoons of sugar.
"So, on my teaspoon of sugar equivalent, even a small slice of brown bread is about three teaspoons of sugar." (said at 1:00:01)
No published record matching the claim that a small slice of brown bread has a glycemic impact equivalent to approximately three teaspoons of sugar was located; this does not prove the claim false.
Food nutritional labeling in the UK separates carbohydrate from fiber, whereas in the United States total carbohydrate labeling includes fiber.
"Confusingly, here we talk about carbohydrate separately from fiber. So that in the UK when it says sugar—in the States you've got the carbohydrate including fiber." (said at 1:04:20)
No published PubMed record directly comparing the regulatory food labeling definitions of total carbohydrate and fiber between the United Kingdom and the United States was located; this does not prove the claim false.
The more carbohydrates a person consumes, the hungrier they become.
"And I didn't realize that the more carbs you eat, the hungrier you become." (said at 1:06:20)
No published record matching the claim that consuming more carbohydrates makes a person progressively hungrier was located; this does not prove the claim false.
During fasting, hunger does not increase continuously or exponentially.
"And what's surprising that you must have found is as you fast, you don't become more hungry, do you?" (said at 1:07:07)
No published record matching the claim that hunger does not increase continuously or exponentially during fasting was located; this does not prove the claim false.
Dr. Jen Unwin published the GRIN model (Goals, Resources, Increments, Noticing) as a brief behavior change framework.
"And that spells GRIN. And that's Jen's published GRIN model. I just did it for you right there." (said at 1:18:45)
No published record matching Dr. Jen Unwin's publication of the GRIN model (Goals, Resources, Increments, Noticing) as a brief behavior change framework was located; this does not prove the claim false.
A 55-year-old patient with severe type 2 diabetes and obesity-related joint damage achieved glycemic control sufficient for surgery by combining a low-carbohydrate diet, continuous glucose monitoring, and a GLP-1 receptor agonist.
"What I did for him in the end, he needed everything. So low carb. Then I got him using a continuous glucose monitor... And on top of that, I did something unusual. I gave him a low dose of the new GLP-1 drugs... And the three together, he managed to not He couldn't moderate but he could abstain. And then he could do it... and he's had his operation now." (said at 1:29:05)
No published record matching the specific case of a 55-year-old patient with severe type 2 diabetes achieving glycemic control sufficient for surgery through a combination of a low-carbohydrate diet, continuous glucose monitoring, and a GLP-1 receptor agonist was located; this does not prove the claim false.
Government figures show that every taxpayer in England pays approximately £7,000 per year for the economic and healthcare consequences of ultra-processed food.
"This is government figures. Every taxpayer in England pays an extra £7,000 tax per year for the consequences of ultra-processed food." (said at 1:50:45)
No published record matching the claim that government figures show every taxpayer in England pays approximately £7,000 per year for the economic and healthcare consequences of ultra-processed food was located; this does not prove the claim false.
Fact-checked episodes
Publications
- The ketogenic diet is not for everyone: contraindications, side effects, and drug interactions.Annals of medicine 2026 · CEBM Level 5
- Correction: Dyńka et al. Ketogenic Diets for Body Weight Loss: A Comparison with Other Diets. Nutrients 2025, 17 , 965.Nutrients 2026 · CEBM Level 5
- The Ketogenic Diet in the Prevention and Treatment of Hypertension (HTN).Biomedicines 2026 · CEBM Level 5
- Insulin Resistance: Current State of Knowledge and Clinical Implications-Toward a Better Diagnostic Framework and the Question of Its Disease Status.Nutrients 2026 · CEBM Level 5
- TOWARD, a metabolic health intervention, demonstrates robust 1-year weight loss and cost-savings through deprescription.Frontiers in nutrition 2025 · CEBM Level 4
- Ketogenic Diets for Body Weight Loss: A Comparison with Other Diets.Nutrients 2025 · CEBM Level 5
- Intermittent fasting in the treatment of type 2 diabetes.Frontiers in nutrition 2025 · CEBM Level 5
- Long-Term Efficacy and Safety of a Low-Carbohydrate Diet in Type 2 Diabetes Remission: A Systematic Review.Cureus 2025 · CEBM Level 1
- Carbohydrate Reduction and a Holistic Model of Care in Diabetes Management: Insights from a Retrospective Multi-Year Audit in New Zealand.Nutrients 2025 · CEBM Level 4
- Integrating the management of ultra-processed food addiction into type 2 diabetes care: a clinical response to De Silva et al, (2025) and practical recommendations for practitioners.Frontiers in psychiatry 2025 · CEBM Level 5
- Does a Ketogenic Diet Have a Place Within Diabetes Clinical Practice? Review of Current Evidence and Controversies.Diabetes therapy : research, treatment and education of diabetes and related disorders 2024 · CEBM Level 5
- Reducing overweight and obesity; so how are we doing?BMJ nutrition, prevention & health 2024 · CEBM Level 5
- Beneficial Effects of the Ketogenic Diet on Nonalcoholic Fatty Liver Disease (NAFLD/MAFLD).Journal of clinical medicine 2024 · CEBM Level 5
- Redefining Diabetes Care: Evaluating the Impact of a Carbohydrate-Reduction, Health Coach Approach Model in New Zealand.Journal of diabetes research 2024 · CEBM Level 5
- A synthesis of pathways linking diet, metabolic risk and cardiovascular disease: a framework to guide further research and approaches to evidence-based practice.Nutrition research reviews 2023 · CEBM Level 5
- What predicts drug-free type 2 diabetes remission? Insights from an 8-year general practice service evaluation of a lower carbohydrate diet with weight loss.BMJ nutrition, prevention & health 2023 · CEBM Level 4
- Dietary strategies for remission of type 2 diabetes: A narrative review.Journal of human nutrition and dietetics : the official journal of the British Dietetic Association 2022 · CEBM Level 5
- The "discordant doppelganger dilemma": SGLT2i mimics therapeutic carbohydrate restriction - food choice first over pharma?Journal of human hypertension 2021 · CEBM Level 5
- Bridging the gap between science-led research and evaluation of clinical practice: the role of service innovation audits and case studies.BMJ nutrition, prevention & health 2021 · CEBM Level 5
- Renal function in patients following a low carbohydrate diet for type 2 diabetes: a review of the literature and analysis of routine clinical data from a primary care service over 7 years.Current opinion in endocrinology, diabetes, and obesity 2021 · CEBM Level 4
- Evaluation of the Low Carb Program Digital Intervention for the Self-Management of Type 2 Diabetes and Prediabetes in an NHS England General Practice: Single-Arm Prospective Study.JMIR diabetes 2021 · CEBM Level 4
- Low-Carbohydrate Diets in the Management of Obesity and Type 2 Diabetes: A Review from Clinicians Using the Approach in Practice.International journal of environmental research and public health 2020 · CEBM Level 5
- Insights from a general practice service evaluation supporting a lower carbohydrate diet in patients with type 2 diabetes mellitus and prediabetes: a secondary analysis of routine clinic data including HbA1c, weight and prescribing over 6 years.BMJ nutrition, prevention & health 2020 · CEBM Level 4
- Adapting diabetes medication for low carbohydrate management of type 2 diabetes: a practical guide.The British journal of general practice : the journal of the Royal College of General Practitioners 2019 · CEBM Level 5
- Substantial and Sustained Improvements in Blood Pressure, Weight and Lipid Profiles from a Carbohydrate Restricted Diet: An Observational Study of Insulin Resistant Patients in Primary Care.International journal of environmental research and public health 2019 · CEBM Level 4
- Outcomes of a Digitally Delivered Low-Carbohydrate Type 2 Diabetes Self-Management Program: 1-Year Results of a Single-Arm Longitudinal Study.JMIR diabetes 2018 · CEBM Level 4
- A patient request for some "deprescribing".BMJ (Clinical research ed.) 2015 · CEBM Level 4