The Glucose Never Lies®

Independent T1D education.
Built on evidence.
Grounded in lived experience.

A diabetes educational advisor, built by a team with skin in the game.

Grace gets you 80% of the way there with 20% of the effort; the final 20% takes self-discovery, guided by human expertise and trial-and-error learning.

Built against approximately 500,000 patient-days from approximately 1,300 people living with diabetes over more than 10 years; validated through 33 structured assessments.

Ask GNL Grace Start with the Foundations
~500k
Patient-days of real-world CGM and insulin data validating every tool
7
Interactive explorers, use your own numbers; built on clinical evidence
40+
Podcast episodes with world-leading T1D clinicians and researchers

Validation dataset: Cockpit 1.0/daily dataset, Syno by Syntactiq Dynamics FlexCo (syntactiq.ai).

Not sure where to start? See how Learn with Grace works: the three tiers, the nine-of-ten gate, and your first step. How it works →

Learn Diabetes with Grace

Solid ground first. Then clarity. Then, if you want it, the deep weeds. Our three tiers, mapped one to one onto the national four-tier competence framework, with a nine-of-ten gate that leaves no doubt where you sit.

Learn Diabetes with Grace, mapped to the DTN-UK four-tier competence framework, with the nine-of-ten mastery gate Three columns run down the page, one per tier. Foundations with Jude maps to DTN-UK Tier 1 Awareness in amber. Advanced with Grace maps to DTN-UK Tier 2 Competence in teal. Mastery with John maps to DTN-UK Tier 3 Expertise in purple. A fourth band below shows DTN-UK Tier 4 Leadership sitting outside the thirty modules, reached through the earned Max account. Along the bottom runs a one-to-ten score scale: one to six routes to the full deep path, seven to eight to a targeted top-up, nine to ten means you have passed. The pass bar is nine of ten. A fair, like-for-like map. And a clearer one. The DTN-UK competence framework is itself a self-assessment. We map our three tiers onto it, one to one, and add a graded gate that leaves no doubt where you sit. LEARN DIABETES WITH GRACE DTN-UK FOUR-TIER FRAMEWORK Richardson and colleagues, Diabetic Medicine 2026, consensus statement Jude Foundations Modules 1 to 10, the building blocks Recognise the device, manage the emergency, signpost to the specialist team. Tier 1 Awareness Any professional who may meet a person using the technology. Avoid harm, escalate. Grace Advanced Modules 11 to 20, where the dots join up Interpret CGM and pump data, work with the algorithm differences, manage intercurrent illness. Tier 2 Competence A working interest in the technology. Read the data; escalate to the specialist team when needed. John Mastery Modules 21 to 30, into the weeds Algorithm internals, advanced interpretation, critical appraisal. We teach the why; hands-on still needs the kit. Tier 3 Expertise The specialist whose role is the technology. Configure, adjust, mentor the wider team. Tier 4 Leadership sits beyond the thirty modules Service development, publication, mentorship at scale, policy. Demonstrated by doing the work, not by a module set. Reached through the earned Max account: pass all thirty at nine of ten, and the continuous, up-to-date surface opens. EARNED Max account earned access, not a priced tier How each module is scored, and how you pass Ten rotating questions, more than one answer plausible. Your score routes what you do next; the pass is always nine of ten. 123 456 78 910 1 to 6: Grace is on the case 7 to 8: Top-up 9 to 10: Nailed it The pass is nine of ten, the same for everyone. Score lower, do the learning, then go again.

See the full guides map

The philosophy

The 20% that changes everything.

Decades of diabetes education has added complexity. More variables. More rules. More anxiety. GNL does the opposite.

We identified the handful of things (insulin on board, glucose trend, starting glucose, therapy type) that explain the vast majority of glucose outcomes. We built everything around those. We removed the rest.

Every guide, every explorer, every podcast episode, and every answer Grace gives follows the same principle: major in the majors. If it does not change the outcome, it does not get airtime.

“Remove what is unnecessary. Own what remains. Build from there.” (Via Negativa)

The trade is honest: GNL chooses depth in a few things over coverage of everything. If a guide does not change how you read a CGM trace or hold a conversation with your team, it does not get airtime.

How to use GNL

Start with Grace. Go as deep as you want.

GNLGrace

Your diabetes education adviser

GNL Grace

Tell Grace what you want to know about. She searches every guide, every podcast episode, and a research engine spanning thousands of clinical papers, then answers in language that fits your background, your device, and your situation.

Ask Grace where to start →

Or explore on your own:

1
Foundations

The essential building blocks: insulin, carbohydrate, activity, CGM, and glucose patterns.

2
Explorers

Use your own numbers. Eight interactive tools covering exercise, AID systems, hypo and hyper treatment, alcohol, and more.

3
Guides

Go deeper. In-depth guides on IOB, CGM technology, AID systems, exercise physiology.

The platform

Everything GNL has built, in one place

Start here
Foundations

The essential building blocks of type 1 diabetes: insulin, carbohydrate, activity, CGM, and glucose patterns. The framework the rest of GNL builds on.

Start with Foundations →
Interactive tools
GNL Explorers

Eight interactive tools covering AID systems, exercise planning, exercise carbohydrate, activity timing, hypo and hyper treatment, and alcohol. Use your own numbers.

Open the Explorers →
Deep dives
GNL Guides

In-depth guides covering insulin on board, CGM technology, AID systems, exercise physiology, and more. Each guide invites you to test it against your own data.

Browse the Guides →
Knowledge educator
GNL Grace

Ask Grace anything. She searches 150+ pages, 40+ episodes, and a research engine spanning thousands of clinical papers, and responds in language that fits you.

Ask Grace →
Podcast
The GNL Podcast

Over 40 episodes covering the science, technology, and lived experience of T1D. World-leading researchers, clinicians, and people living with the condition.

Listen now →
Community
Inspiring Stories

Real experiences from people living with type 1 diabetes; exploring what it means to manage a condition that never takes a day off.

Read Stories →

The GNL Podcast

Latest episodes

What’s new

Recently published

Behind Grace

How we built Grace

A seven-year build, decoded. John walks through the three layers, the Taleb philosophy underneath, and the conversation with Tomorrow’s Medicine that brought it all on the record.

Hear the build story →
New Guide

Adjunctive Therapy in T1D

GLP-1 and GIP in type 1 diabetes: the four-part guide built from ADJUNCT I/II, ADJUST-T1D, and the DTS consensus. Grade A evidence where RCTs exist.

Read the guide →
New Guide

HbA1c and Time in Range

Five parts: the CGM Zone framework, glycator biology, finding your status, a personalised target matrix, and the Nassim Taleb lens on ensemble statistics.

Read the guide →

The team

Built by clinicians, researchers, and creators

United by science, storytelling, and lived experience with type 1 diabetes.

Founder & Clinical Lead
John Pemberton

Registered Dietitian and Diabetes Specialist, Birmingham Women’s and Children’s NHS Foundation Trust. Living with type 1 diabetes for over 25 years. Creator of GNL, the Explorers, and the Grace knowledge educator.

Co-Director, Creative
Anjanee Kohli

Registered Dietitian and Diabetes Specialist, BWC NHS Trust. Director of creativity and community at GNL: podcast, visual content, and the GNL voice.

Technical Director
Phillip Hayes

Lead developer behind the GNL Explorers and platform infrastructure. Designed and built the interactive tools and the Grace API endpoint.

Scientific Adviser (Non-Executive)
Professor Dessi Zaharieva

Stanford University. Exercise physiology and T1D; independent scientific review and challenge on every GNL output.

Scientific Adviser (Non-Executive)
Professor Othmar Moser

University of Graz. AID systems and exercise; world-leading research in real-world T1D management with technology.

Scientific Adviser (Non-Executive)
Dr Adrian Brown

Independent scientific review and challenge, ensuring every GNL output is rigorous, accurate, and grounded in current evidence.

Every Wednesday morning

Via Negativa Research Bytes

A short weekly distil from the GNL research engine. Five papers picked from the last seven days, grouped by topic, with the GNL takeaway alongside each one. Stripped to the 20% of the evidence that changes 80% of how you think. Written by the clinical team, reviewed by the scientific advisers.

John Pemberton and Phillip Hayes, reviewed by our independent scientific advisers. No sponsors. No filler.

Via Negativa Health

Clinical co-brand. Platform build.
Skin in the game.

Via Negativa Health works with T1D coaches, creators, and digital health businesses who want clinical depth, validated tools, and a partner with something to lose alongside them.

“Remove what’s unnecessary. Own what remains. Build from there.”

Via Negativa Health →

Contact

Get in touch

We welcome opportunities for consultancy, educational projects, speaking engagements, and content development.

Consultancy & Projects
Content & Creative

Sponsor a free account

Sponsor a free Grace account

Grace is free for your first 30 days, with type 1 diabetes or as a healthcare professional, then GBP 5 a month or GBP 50 a year (HCP licence GBP 20 a month or GBP 200 a year). Sponsorship keeps Grace open for the people who cannot pay: every GBP 5 at Buy Me a Coffee funds one free account, up to GBP 50 for ten.

Keep reading

Where readers go next

Foundations, 12 topics in sequence → All GNL Guides hub → How GNL Grace works → The GNL Podcast → Exercise and T1D, 5-part guide → About GNL and the team →

The Glucose Never Lies® is a registered trademark (UK00004267795). GNL is an independent education platform; not a medical device, not a clinic, and not a substitute for clinical advice. All content is for education and discussion only. How Grace Works · Full Disclaimer · Privacy

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