GNL Guides
Build solid foundations,
follow your curiosity,
and learn about tech.
This is what we wish we had when we were diagnosed.
1. Start here, the foundations
The non-negotiables. What type 1 is, how carbohydrate and insulin fit together, what ketones mean, and how to tell whether things are going well. Start here even if you have lived with type 1 for years.
Foundations first, always. The sections below reward a reader who has done the foundations. The order on this page is the order we teach, the order we use ourselves, and the order we recommend to anyone who asks.
2. Everyday management
The day-to-day. Pick the guide closest to the question on your mind: mealtimes, insulin on board, the highs and the lows, exercise, sleep, insulin resistance, a night out. Each one gives shape to work you already know.
3. Technology, medicines and the evidence
The kit, the medicines, and how to weigh the research for yourself. We only cover what we would use ourselves and give the people we love, and we show our working.
Devices and medicines
Reading the evidence
4. Life stages
Type 1 changes with the season of life. Guides for childhood through to adulthood, for adults, and for female biology across the life stages (the menstrual cycle sits inside the female guide).