Your fasting blood glucose of 83 mg/dL is excellent, while your HbA1c of 6.0% indicates prediabetes (5.7% to 6.4%). There is no need to panic; this is highly manageable and often reversible. Medication is usually not required at this stage. The most effective treatment is lifestyle modification: adopt a balanced diet low in refined sugars, and engage in 150 minutes of moderate exercise weekly. These changes can prevent progression to diabetes. Please consult your doctor to monitor your levels yearly and discuss if any preventive treatment, like metformin, is necessary based on your overall health.