Prevention Diabetes Type 1

There are both what are called primary preventative methods and secondary preventative methods. Unfortunately, at this time the primary measures are largely theoretic. It is possible to have one's DNA analysed to see if that person has a type of genetic material which type 1 diabetics typically have.
However, the ability to stop the disease occurring should this be found is only theoretical at the moment, but with all the DNA sequencing and research being carried out these days, it is only a matter of time until a discovery in this area is made.
There is also the possibility of a vaccination, which is under development at the moment. This will work by making cells that prevent the cells from the pancreas from the autoimmune response that some people are predisposed to, which destroys the cells of the pancreas that make insulin.
So we have secondary preventative measures, one of which is the use of steroids, which block the autoimmune condition. However, they have side effects, particularly in young children, which include growth problems and infections, and the treatment is not 100% effective.
Secondly there are what are called cytotoxic drugs. These drugs kill the cells that attack the pancreas. However, like steroids they are not 100% effective, and can kill other cells as well as the target cells.
Thirdly, there are drugs called nicotinamide, a form of vitamin B. These have proved successful in tests in mice, but less so in humans, where 20% of patients did not develop the symptoms of diabetes.
Lastly, insulin has been used to delay the onset of diabetic symptoms and has shown that it may be effective, but more research needs to be done.
The most effective preventative method is something that is fundamental to diabetes treatment, and that is maintaining close control of one's blood sugar levels.