Fasting blood glucose 6.8mmol/L is high and abnormal for normal people; it is within the target range and normal for diabetic patients. 1. The normal value of fasting blood glucose for normal people is between 3.9~6.1mmol/L, so fasting blood glucose 6.8mmol/L is high, and it is recommended to consult a professional physician for a clear diagnosis. 2. For patients who have been diagnosed with diabetes in the past, fasting blood glucose should be controlled between 4.4~7.0mmol/L, so fasting blood glucose of 6.8mmol/L can reach the control target, and can continue the current treatment program. Once elevated blood glucose levels are detected, prompt medical attention is recommended. Patients with abnormal blood glucose need to control their diet, avoid high intake of sugary foods, exercise appropriately, and monitor their blood glucose regularly.