MODEL RELEASED. Insulin injection. Diabetic teenage girl injecting herself in the abdomen with insulin. She has diabetes mellitus. This is a disorder affecting glucose sugar metabolism, where sugar is not oxidised due to a lack of the pancreatic hormone insulin. Unused sugar accumulates in the blood and the urine. Fats are utilised as an alternative energy source, which leads to a build- up of ketones in the blood that may eventually cause convulsions and diabetic coma. Treatment is based on a strict diet and the use of daily insulin injections to maintain the blood-sugar balance. This is a Mixtard 30 Penfill insulin capsule and injector.