Also I live in the States. Some people have hypothesised that cannabis can lower your blood sugar, hence, the munchies. I checked my blood sugar before and after a joint - there was just an 8 point difference and I know my meter is not always that accurate. So I don't think you could argue that it would lower your blood sugar. However, there is scientific evidence that cannabis can prevent or alleviate certain types of neuropathy. And since diabetic neuropathy is so common... Try googling it, I believe it was done in Israel. I think you are going to have a struggle getting legal. Research things thoroughly, and learn the medical jargon so you can argue on equal terms with your doctor. Good luck!