Arabella has to inject herself every day. Without these injections, she would die.
At the age of 6 she was diagnosed with diabetes.
Diabetes affects over 400 million people worldwide
So what is diabetes?
To stay alive our bodies must constantly control our sugar levels.
This ensures all our cells are provided with the energy they need to function, while preventing blood sugar concentration from getting too high.
The hormone insulin is the chemical messenger that performs this important job.
Hormone produced in the pancreas
Controls glucose levels
During digestion, glucose released from the food we eat, passes from the small intestine into the bloodstream. This triggers the pancreas to secrete insulin.
The insulin helps move glucose into the body cells that need it, reducing the level of sugar in the blood. Diabetes develops when there's a problem with insulin production or sensitivity.
There are two different types of diabetes – type 1 and type 2. It is possible to manage the symptoms of both, but neither can be cured.
Type 1 Diabetes
The onset of type 1 diabetes is normally rapid, and typically occurs at a young age.
The insulin-producing cells in the pancreas are destroyed completely.
In most cases this is thought to be caused by the body's immune system turning on itself, and there's currently no way to prevent it.
Without insulin control, glucose builds up in the bloodstream unchecked.
Cells start to break down protein and fat for energy instead, which causes toxic by-products to accumulate, and can ultimately lead to coma and death.
Type 1 diabetes is treated by daily insulin injections, and sufferers must be careful not to cause surges in blood sugar level.
Type 2 Diabetes
Type 2 diabetes normally develops later in life, after the age of 40, and is often associated with lifestyle factors such as being overweight and inactive.
Unlike in type 1 diabetes, the body can still produce some insulin, but this is either too little, or the body doesn't react to it properly – it has developed a resistance to insulin.
We can all help protect ourselves from type 2 diabetes by keeping fit and eating a balanced diet without too much sugar, maintaining a healthy pancreas and insulin supply.