Type 2 diabetes (T2D) is an illness characterized by high blood sugar and insulin resistance. Common symptoms are increased thirst and frequent urination. Long-term complications from T2D include heart disease, stroke, diabetic retinopathy (eventual blindness), kidney failure, and poor blood flow in the limbs (possible amputation). Diagnosis of diabetes is done through blood tests such as fasting plasma glucose and glycated haemoglobin (A1C).