Fasting blood glucose 6.17mmol/L is on the high side for normal people, and is within the target range for diabetics, which is not high. 1. The normal value of fasting blood glucose for normal people is between 3.9 and 6.1mmol/L, so fasting blood glucose 6.17mmol/L is slightly higher than the normal range, 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 and 7.0 mmol/L. Therefore, fasting blood glucose of 6.17 mmol/L has reached the control target, and can be continued with the current treatment program. Diabetic patients are advised to maintain a regular diet, eat less sweets and overly greasy food, and engage in regular outdoor exercise to help control blood glucose. Once elevated blood glucose levels are detected, prompt medical attention is recommended.