Anja-Sophia Reh has diabetes. With her sister, she researches how blood sugar changes during the menstrual cycle. Recorded by Doris Schneyink

I’ve had diabetes for as long as I can remember. At first it was a shock for my parents. I was only three years old when the metabolic disease was diagnosed. In people with type 1 diabetes, the pancreas does not produce insulin, and the hormone has to be administered artificially, otherwise there is a risk of long-term damage to important organ systems.

My family took care of me. My two big sisters did the pupil check. They looked me in the eye and when the pupils were very small compared to the pupils of other people in the room, then they knew, ok, Anja-Sophia has hypoglycaemia and needs carbohydrates.