The Glucose Never Lies®
Independent T1D education.
Built on evidence.
Grounded in lived experience.
An education platform for people with type 1 diabetes – built by clinicians and people with T1D, validated against the largest real-world dataset ever used for T1D education outside a pharmaceutical or device manufacturer.
What’s here
Everything GNL has built – in one place
Guides, explorers, podcast episodes, and a knowledge educator that brings all of it together. Start where you are. Go as deep as you want.
Ask Grace anything. She searches 150+ pages, 40+ episodes, and a research engine spanning thousands of clinical papers – and responds in language that fits your background and situation.
Ask Grace →Six interactive tools covering AID systems, exercise physiology, hypo and hyper management, and exercise carbohydrate estimation. Built on clinical trial data. Use your own numbers.
Open the Explorers →Over 40 episodes covering the science, technology, and lived experience of T1D. World-leading researchers, clinicians, and people living with the condition every day.
Listen now →The essential building blocks of type 1 diabetes – insulin, carbohydrate, activity, CGM, and glucose patterns. The framework the rest of GNL builds on. Start here if you are new.
Start with Foundations →In-depth guides covering insulin on board, CGM technology, AID systems, exercise physiology, and more. Each guide explains the mechanism and invites you to test it against your own data.
Browse the Guides →Real experiences from people living with type 1 diabetes – exploring what it means to manage a condition that never takes a day off, and finding strength in shared understanding.
Read Stories →What is GNL?
An independent education platform – not a device manufacturer, not a clinic, not a brand with a product to sell
GNL explains the mechanisms behind glucose behaviour – why insulin, food, activity, and physiology interact the way they do – so you can build your own understanding through observation, exploration, and conversation with your care team.
Everything here is built around one idea: that understanding the mechanisms behind glucose behaviour, and testing that understanding against your own CGM data, is the most powerful form of diabetes education. GNL does not tell you what to do. It explains what tends to happen on average, describes the science, and invites you to explore. Your care team provides the clinical guidance. Your CGM provides the feedback. The learning happens in the space between.
Knowledge Educator
Meet GNL Grace
Grace makes everything GNL has built accessible in a single question. Over 150 pages, 20 guides, 40+ podcast episodes, and a research engine spanning thousands of clinical papers – all validated against 2.5 million patient-days of real-world T1D data.
Ask her what is available. Ask where to start. Tell her your age, your device, your total daily dose, your hypo history – and she will respond in language that fits your background and your specific situation. She is not a search box. She is a knowledge educator – built to tell you what the research actually says, including when that differs from what the people around you believe.
Grace is modelled on John’s daughter – which means she is warm, clear, occasionally funny, and entirely unwilling to be vague when the evidence is not.
What’s new
Recently published
GNL Grace is here
Ask Grace anything about type 1 diabetes and she will search every GNL guide, article, podcast episode, and research source to give you a clear, evidence-graded answer – personalised to your device, your experience, and your situation.
Meet GNL Grace →New Financial Year, New You
Five behaviour change principles for type 1 diabetes – from GNL Podcast Episode 29 with Vanessa Haydock. Small nudges that actually stick, grounded in applied behaviour analysis and lived experience.
Read the article →The IOB Trade-Off
How AID systems see insulin differently – and why the gap between device-reported IOB and true insulin exposure matters more than most people realise.
Read the article →The team
Built by clinicians, researchers, and creators
United by science, storytelling, and lived experience with type 1 diabetes.
Registered Dietitian and Diabetes Specialist, Birmingham Women’s and Children’s NHS Foundation Trust. Creator of GNL, the Explorers, and the Grace knowledge educator.
Registered Dietitian and Diabetes Specialist, BWC NHS Trust. Director of creativity and community at GNL – podcast, visual content, and the GNL voice.
Lead developer behind the GNL Explorers and platform infrastructure. Designed and built the interactive tools and the Grace API endpoint.
Stanford University. Exercise physiology and T1D – independent scientific review and challenge on every GNL output.
University of Graz. AID systems and exercise – world-leading research in real-world T1D management with technology.
Independent scientific review and challenge – ensuring every GNL output is rigorous, accurate, and grounded in current evidence.
Contact
Get in touch
We welcome opportunities for consultancy, educational projects, speaking engagements, and content development.
We invite everyone who reads, listens, or learns with us to judge our work by its accuracy, transparency, and value to the diabetes community. That is what The Glucose Never Lies® stands for, and always will.