i know that nick jonas has type one diabetes but he isnt big! he is really skinny and he says sometimes his blood sugar is low but i thought people who where bigger or ate to many bad things got diabetes! help me understand this please? thanx!

http://health.yahoo.com/diabetes-overview/type-1-diabetes-topic-overview/healthwise--hw34305.html

http://www.diabetes.org/type-1-diabetes.jsp

http://en.wikipedia.org/wiki/Diabetes_mellitus_type_1