The genetic history of the British Isles is the subject of research within the larger field of human population genetics. It has developed in parallel with DNA testing technologies capable of identifying genetic similarities and differences between populations.he genetic history of the British Isles is the subject of research within the larger field of human population genetics. It has developed in parallel with DNA testing technologies capable of identifying genetic similarities and differences between populations.
Brittle diabetesâalso called labile diabetesâis a rare but serious form of the disease in which there are dramatic and often unpredictable fluctuations in blood sugar levels. Blood sugar naturally rises and falls throughout the day in response to meals, exercise and other factors.
Diabetes facts. 1  Diabetes is a chronic condition associated with abnormally high levels of sugar (glucose) in the blood. 2  Insulin produced by the pancreas lowers blood glucose. 3  Absence or insufficient production of insulin causes diabetes. 4  The two types of diabetes are referred to as type 1 and type 2. Insulin produced by the pancreas lowers blood glucose. 2  Absence or insufficient production of insulin causes diabetes. 3  The two types of diabetes are referred to as type 1 and type 2. 4  Former names for these conditions were insulin-dependent and non-insulin-dependent diabetes, or juvenile onset and adult onset diabetes.