I am a 31 yr old male and my blood sugar was at 104. Does this mean I have diabetes? I exercise regulerly and try to eat right most of the time. I am curious about diabetes because my doctor explained to me that people whos blood level rise above 100 are more sucseptible to diabetes. She told me people who arent susceptible to diabetes can eat sweets and carbs all they want and their blood sugar never rises above 100.