28 Feb 2014 --- Low levels of vitamin D are commonly found in people with type 1 diabetes. But even children who have multiple positive islet autoantibodies without manifest type 1 diabetes have lower levels of vitamin D in their blood. This does not appear, however, to influence the progression of the disease from pre-diabetes to diabetes, according to scientists from the Helmholtz Zentrum München and the Technical University of Munich in the specialist journal Diabetologia.