The Glucose Never Lies® Resource Hub
Downloadable, evidence-backed tools for people living with T1D
Two-sided A4 resources that model what each CGM, AID system and exercise approach offers; the 20% of actions that make 80% of the difference. Every resource is Grace peer-reviewed, links to our explorers, and is free to download and print.
Ask Grace
Not sure which resource you need? Tell Grace what you are using (CGM, pump, AID, or just starting out) and she will point you to the right one.
The hub is sorted by what you are doing, not by what GNL has published. Start with Foundations if you are new; jump to the device row if you already have a CGM, pump, or AID.
CGM · Continuous Glucose Monitoring
CGM Survive & Thrive
One resource per device. What it offers, how to get the most out of it, and the two actions on any CGM that move HbA1c most: walking a high down early, and personalised hypo treatment.
Dexcom G7
Real-time glucose every 5 minutes. Urgent Low Soon, Delay First High, up to 10 Share followers. AID integration: Omnipod 5, Control-IQ, CamAPS FX.
FreeStyle Libre 3 Plus / 2 Plus
15-day wear. Libre 3 Plus is the smallest CGM available. Every-minute Bluetooth push. LibreView integrates with SystmOne and EMIS.
Medtronic Simplera Sync
Sensor for the MiniMed 780G AID system. 6-day wear. Upper arm only. The confirmation-check gotcha and what “93% SmartGuard time” actually means.
AID · Automated Insulin Delivery
AID Survive & Thrive
One resource per system. What each algorithm does, the primary optimisation lever (Target, CF, AIT or ICR), and the GNL configuration tiers – Optimal, Balanced, Protective – all Grace peer-reviewed against registry data.
Omnipod 5 · Insulet
Tubeless. SmartAdjust algorithm lives in the Pod. Primary lever: Target. 64.2% real-world TIR at 6.1 mmol/L target (Forlenza 2024, n=69,902).
Tandem t:slim X2 Control-IQ
Tubed. Most customisable AID. Primary lever: Correction Factor. Sleep Mode 24/7 strategy. 79.1% TIR in the strongest CF quartile (Messer 2023, n=20,764).
MiniMed 780G · SmartGuard
Tubed. Highest algorithm strength for highs – continuous auto-correction boluses. Primary lever: AIT. 78.8% TIR on optimal settings (Choudhary 2024, n=101,629).
CamAPS FX · CamDiab / YpsoPump
Cambridge-developed adaptive algorithm. Approved from age 1. Primary lever: ICR. Boost + Ease-off modes with real-world safety data (Royston & Hovorka 2024, n=7,464).
Exercise · managing glucose around activity
Exercise Survive & Thrive
Three resources split by insulin regimen. Every sheet anchors on the three variables that decide almost everything: Insulin on Board, Starting Glucose, Trend Arrows. Bolus reduction schedules (Rabasa-Lhoret), carb targets (Riddell, Campbell) and the 10-second sprint trick (Bussau) are in every one.
Exercise on MDI
Multiple Daily Injections. Pre-meal bolus reduction (the only insulin lever you have) + carb intake. Long-acting basal is fixed – work around it.
Exercise on Pump Therapy
Non-AID pump. The temp basal advantage – 60-90 min lead time, 50% reduction typical. Pump disconnection vs waterproof Omnipod. Long overnight temp basal for sustained protection.
Exercise on AID Systems
Every UK AID system – Omnipod 5, Control-IQ, 780G, CamAPS FX. What each exercise mode does, what the algorithm can’t claw back, and what you still need to do.
How these resources were built
Grace peer-reviewed, design-system aligned
Every resource went through a two-stage build. First a truth-seeking content draft, reviewed by GNL Grace against her graded evidence base – Garg 2022 pivotal trial for Dexcom, Abbott 2022 for Libre, Choudhary 2024 for 780G, Messer 2023 for Control-IQ, Forlenza 2024 for Omnipod 5, Boughton 2026 for CamAPS FX, Rabasa-Lhoret 2001 and Moser/Zaharieva 2024 for exercise. Then a design pass against the GNL Guide Design System so every resource looks and feels like part of one family.
Educational only. These resources describe how CGM, AID and exercise strategy behave on average, not how they behave for you. They are not prescriptions and not medical devices. Any changes to insulin settings, device configuration or diabetes management must be made with your diabetes care team. Full disclaimer: theglucoseneverlies.com/disclaimer.
All trademarks belong to their respective owners: Dexcom™, G7™ (DexCom, Inc.); FreeStyle Libre™ (Abbott); MiniMed™, SmartGuard™, Simplera™ (Medtronic); t:slim X2™, Control-IQ™ (Tandem Diabetes Care); Omnipod 5™, SmartAdjust™ (Insulet); CamAPS FX™ (CamDiab Ltd); YpsoPump™ (Ypsomed). The Glucose Never Lies® is not affiliated with any of these manufacturers.