The bad news: As a type 1 diabetic, I wouldn't be around too long after the end of civilization. It would depend on whether I could raid a drugstore or two and then, after that expired, find some pigs, or however they used to get insulin.
The good news: I would be a good candidate for high-risk/suicide missions, if the need arose.
I just read some news today of researchers in Israel starting clinical trials of a new insulin machine. They are using cells taken by liver biopsy, treating them to produce insulin, and then reintroducing them into the body. Seems to have much possibility!