@MissA – You said
Type One is inherited.
Type Two is lifestyle created.
Well, it’s a little more complicated than that. There’s a genetic component in type 2 as well and though most cases are lifestyle created, there’s a significant amount which isn’t at least not correlating with obesity and lack of exercise. There are type 2 diabetics who get it even though they never were overweight.
There’s a genetic predisposition for type 1, but the environment seems to be a factor too and it’s not completely understood. Something seems to upset the immune system. And statistics show an increase as well, which cannot be explained by genetics alone. See for example
http://cardiobrief.org/2009/05/27/explosive-increase-in-type-1-diabetes-predicted/
The overall incidence of type 1 diabetes in Europe will undergo explosive growth over the next decade, with the biggest increases occurring in children under 5 years of age, according to data from the EURODIAB study published online in the Lancet. Researchers found an overall 3.9% per year increase in the incidence of type 1 diabetes; in children under 5 the rate was 5.4%.
The researchers are uncertain about the precise causes for the increase in incidence and earlier age of onset of type 1 diabetes, but say that the rapid changes rule out genetic factors alone. The biggest changes are occurring in Eastern Europe, where fundamental changes in lifestyle habits are taking place.
In an accompanying Comment, Dana Dabelea notes that the younger age at onset will lead to an increased risk of diabetic ketoacidosis, and that the “longer duration of exposure to an altered metabolic milieu” will substantially increase “the risk of chronic microvascular and macrovascular complications.”
The findings may have important implications that go far beyond Europe. “Recent projections suggest that the prevalence of type 1 diabetes in young people will increase most in less developed parts of the world, even though the incidence is now lowest there,” writes Dabelea. Similar growth may also be expected in the US, especially in some non-white populations.