The Glucose Never Lies® Articles
Original articles on type 1 diabetes, technology, and the thinking behind the numbers
Evidence-backed writing that goes deeper than the guides. From the philosophy of risk to the physiology of insulin, from the 120-day carb experiment to the CGM Black Swan.
GNL Grace
Looking for something specific? Ask Grace and she will point you to the right article, guide, or explorer.
Thinking & Philosophy
The ideas behind the numbers
Original analysis that reframes how we think about glucose, risk, and what “good enough” really means in type 1 diabetes.
How Would Taleb Use HbA1c and Time in Range?
Ergodicity, the 90-day rule, and why your HbA1c is not a simple average. Nassim Nicholas Taleb’s risk framework applied to T1D metrics.
Read articleThe CGM Black Swan
Pursuit of simplicity and asymmetric risk. Why a single glucose reading can be more informative than a month of averages.
Read articleSame Glucose, Higher HbA1c
Why double standards matter. Two people with identical CGM traces can have different HbA1c results; the implications are serious.
Read articleTechnology & Algorithms
How the devices actually work
Deep dives into the engineering and clinical evidence behind CGM accuracy, AID algorithms, and insulin on board.
The IOB Trade-Off
How four AID systems make different bets on insulin. Omnipod 5, Control-IQ, 780G, and CamAPS FX each handle insulin on board differently; the consequences are measurable.
Read articleCGM Calibration in AID
Why accuracy is your algorithm’s airbag. What happens when the CGM is wrong and the AID system is making decisions based on that wrong number.
Read articleDynamic Glucose Management
Thriving with CGM. How to use continuous glucose data as a decision tool, not just a display.
Read articleGlucose Management
Practical strategies that move the needle
Evidence-based approaches to everyday glucose management; from correction dosing to behaviour change to the simplest intervention of all.
The 20 by 2 Rule
Activity snacking to supercharge insulin and get back in range. The simplest, most underused tool in glucose management.
Read articleCorrection Insulin: Why Patience Matters More Than Maths
The insulin stacking trap. Why waiting is harder than calculating, and why it matters more.
Read articleBehaviour Change for T1D
New financial year, new you. Five behaviour change principles applied to type 1 diabetes management.
Read articleInsulin Resistance
The hidden variable in type 1
Insulin resistance is not just a type 2 problem. These articles cover the causes, the consequences, and practical strategies.
Eight Causes of Insulin Resistance
From sleep to stress to visceral fat. The eight mechanisms that make insulin work less effectively, and which ones you can change.
Read articleSeven Ways to Combat Insulin Resistance
Evidence-backed interventions that improve insulin sensitivity in type 1 diabetes.
Read articleExercise & Activity
Moving with type 1
From the physiology of aerobic and anaerobic exercise to practical AID-era strategies.
Exercise and Type 1 Diabetes
The practical guide. Before, during, and after; MDI, pump, and AID; aerobic and anaerobic.
Read articleAerobic Exercise: Stop the Drop
Why endurance exercise drops glucose, the mechanisms behind it, and the strategies that work.
Read articleCGM and Exercise for T1D
Using trend arrows and rate of change to make exercise decisions in real time.
Read articleAID Systems and Exercise
Key guidance for exercising on automated insulin delivery. What the algorithm handles, what it cannot, and what you still need to do.
Read articleClinical Deep Dives
Understanding the physiology
Foundational clinical topics explored in depth, with evidence grading.
Hyperglycaemia: Why Glucose Goes High
The mechanisms behind high glucose in type 1 diabetes; from missed boluses to dawn phenomenon to stress hormones.
Read articleKetones in Type 1 Diabetes
When ketones are dangerous (DKA), when they are not (nutritional ketosis), and how to tell the difference.
Read articleC-Peptide: What Type of Type 1 Do You Have?
Residual beta-cell function, honeymoon periods, and why C-peptide matters for treatment decisions.
Read articleUnder-5s and Type 1 Diabetes
What actually matters most. The unique challenges of managing T1D in very young children.
Read articleLifestyle & Real Life
Living with T1D beyond the clinic
Alcohol, substances, skincare, food experiments, and the parts of life that textbooks skip.
My 120-Day Carb Experiment
What John learned living it. Four months of tracking every carbohydrate, every bolus, every outcome.
Read articleAlcohol and Type 1 Diabetes
Risks and safety strategies. What alcohol does to glucose, insulin sensitivity, and hypo awareness.
Read articlePartying with T1D
The full guide. Alcohol, late nights, dancing, festivals, and the 24-hour glucose aftermath.
Read articleCannabis, Ketamine and Hallucinogens
Substances and type 1 diabetes. What the evidence says, what it does not say, and what to watch for.
Read articleStimulants and Type 1 Diabetes
Risks, sleep and glucose. Caffeine, ADHD medication, and other stimulants through a T1D lens.
Read articleSkincare for CGM and Pump Sites
Adhesive reactions, site rotation, barrier films, and keeping skin healthy under continuous wear.
Read articlePersonal & Mental Health
The human side
Burnout, ADHD, depression, and the lived experience that clinical papers rarely capture.
The Horrid Triad
Physical and mental decline in T1D. Part 1 of John’s personal account of depression, burnout, and the path back.
Read articleThe Lights Came On
From breakdown to breakthrough with ADHD. Part 2: diagnosis, medication, and what changed.
Read articleMe and T1D/ADHD/FMD
John’s account of living at the intersection of type 1 diabetes, ADHD, and fibromuscular dysplasia.
Read articleConference Reports
What the research conferences revealed
Highlights and analysis from the major diabetes technology and research conferences.
EASD 2025
The technologies that will reshape diabetes care. Highlights from the European Association for the Study of Diabetes.
Read articleATTD 2025 Top 10 Hits
Advanced Technologies and Treatments for Diabetes. The ten presentations that mattered most.
Read articleISPAD 2024
International Society for Pediatric and Adolescent Diabetes. Highlights from the paediatric frontline.
Read articleEXTOD 2023
Simplifying exercise management for type 1 diabetes. The exercise and technology research day.
Read articleFAQs & Quick Reference
Common questions, evidence-backed answers
Focused FAQ pages on the topics people ask about most.
Exercise & T1D FAQ
Activity, exercise, and type 1 diabetes: the most common questions answered.
Read FAQSkincare FAQ
Skincare for type 1 diabetes and technology. Adhesive reactions, sites, and barrier products.
Read FAQAdjunctive Therapy in T1D
GLP-1RA and GLP-1/GIP as the third advanced lever alongside CGM and AID. Four-part guide plus FAQ.
CamAPS FX FAQ
Common questions about the Cambridge adaptive algorithm, Boost and Ease-off modes, and practical tips.
Read FAQInspiring Stories
Real lives, real resilience
People living with type 1 diabetes sharing their experiences in their own words.
All Inspiring Stories
The full collection of GNL Inspiring Stories from people living with T1D around the world.
View all storiesLojain’s T1D Reality in Gaza
Living with type 1 diabetes in a conflict zone. Access, supplies, and survival.
Read storyRoger’s Journey Toward Freedom
Roger’s T1D journey. Diagnosis, adjustment, technology, and the road to independence.
Read storyWhen Movement Stops
A wife’s story of love and survival. The partner perspective on T1D, told with unflinching honesty.
Read story