Type 1 diabetes

Type 1 diabetes (T1D) is fundamentally different from type 2. It is an autoimmune disease: the immune system attacks and destroys the beta cells of the pancreas (islets of Langerhans) that make insulin. The result is a total and permanent insulin deficiency. It accounts for ~10% of diabetes cases and often appears young (childhood or adolescence), but can develop at any age.

The original angle (clearing up the confusion with type 2): the confusion between T1D and T2D is widespread and a source of hurtful prejudice. Key distinctions:

• T1D: autoimmune origin, NOT linked to lifestyle or diet. You do not “catch” it by eating too much sugar. Absolute insulin deficiency → vital, immediate insulin injections
• T2D: insulin resistance linked (in part) to lifestyle, with a gradual onset, and often manageable at first without insulin

Telling a person with T1D “you ate too much sugar” is false and unfair: it is an autoimmune disease, not a choice.

Management (a permanent job): people with T1D have to:

1. Inject insulin (pens, pump), calculating doses according to the carbohydrate eaten, activity and blood glucose
2. Monitor their blood glucose (continuous sensors, finger-prick tests)
3. Constantly balance intake, insulin and activity, an exercise in adjusting from moment to moment

The role of nutrition (crucial but different): unlike T2D, nutrition does not “cure” T1D, but carbohydrate counting is central to adjusting insulin. Protein and fat count too (see the insulin index). A diet with a well-controlled glycaemic index makes blood glucose easier to keep stable.

A specific danger, ketoacidosis: when insulin is lacking (a missed dose, illness), T1D can tip into diabetic ketoacidosis, a life-threatening emergency (not to be confused with benign nutritional ketosis).

Hopes: research into stem cells, the artificial pancreas (a closed-loop insulin-sensor system) and preventive immunotherapies.