not all type 1s are diagnosed when they are young, both me and my mum got type 1 in our mid 30s. To put it simple the difference between type 1s and 2s is that type 1 is an autoimmune disease meaning their immune system attack and kill the insulin makng cells in the pancreas, so once this process is complete they are unable to make any insulin at all, where as type 2s do make some insulin but not enough for various reasons eg they are insulin resistant meaning they produce it but cant use it effectivly so need more to gain the desired result, anyway thats just a quicky answer theres much more to it than that but I could be here all day :lol: