I'm pretty sure that type 1 is not hereditary, and if anything type 2 would be more in someones genetics. And my endocrinologist told me that it wasn't. But in two of the courses i took this year at school, they both said that type 1 is genetic. And my friend also took a class that said that type 1 is genetic. I really don't think it is. And i was just wondering what others have heard on the topic..