Increased risk of Heart attack/ Angina/ Stroke, Nerve damage, Kidney damage, Gastroparesis (Nausea/ vomiting) Diarrhea or constipation, Eye damage - blindness, Increased risk of cataract and glaucoma, Foot damage/ amputations, Skin infections, Increased risk of Alzheimer's disease/ Depression/ Hearing impairment.
Diabetes is condition for which exact cause is unknown. But being unhealthy interms of obesity and other comorbid conditions increase the risk of developing diabetes, there are other causes such as family history/ presence of autoantibodies/ polycystic ovarian syndrome etc which increase the risk.
High sugar levels causes blood vessel damage, vascular remodelling leading to increased peripheral artery resistance. Also, body fluid volume increases in response to insulin resistance-induced hyperinsulinemia and hyperglycemia. Both increased peripheral vascular resistance and body fluid volume lead to increase in systemic blood pressure causing Hypertension.
No fruit or vegetable can totally get rid of Diabetes but having fruits/vegetables with low glycemic index may prevent or manage Diabetes.
Your genes definitely play a role in type 1, a less common form of diabetes that's often diagnosed in children and young adults.
Exact cause is unknown but most appreciated hypothesis is either low insulin or insulin resistance due to genetic +/- environmental factors. Symptoms and signs include increased thirst, extreme hunger, unexplained weight loss, frequent urination, fatigue, irritability, blurred vision, slow healing wounds, presence of ketones in urine, fruity odour and frequent infections.Treatment is either tablets or insulin to control blood sugar levels along with life style modifications (Diet + exercise).