Glucose Testing

Recommendations for the best time of day to test your blood sugar depend on your medicine, mealtimes and sugar control. On the chart below, your doctor will check the times when you should test your sugar. Your doctor may also suggest different goals, depending on your situation.


Time to Test:  Fasting, Before Breakfast 1-2 Hours After Breakfast Before Lunch  1-2 Hours After Lunch Before Dinner  1-2 Hours After Dinner Bedtime 3 A.M.
Target Ranges1 80-120  < 180  80-120  < 180  80-120  < 180  100-140  70-110 
Target Ranges2 90-130  < 180  90-130  < 180  90-130  < 180     
Target Ranges3 80-120  < 170  80-120  < 170  80-120  < 170     
Target Ranges4 70-110  < 160 or 120  70-110  < 160 or 120  70-110  < 160 or 120    70-110 
Doctor's Recommendation                             
Monday                            
Tuesday                            
Wednesday                            
Thursday                             
Friday                              
Saturday                               
Sunday                        


Footnotes

1 American Academy of Family Physicians

2 NIH - Plasma Values (Ask your health care team whether your meter gives the results as plasma or whole blood glucose. Most new meters provide the results as plasma glucose.)

3 NIH - Whole Blood Values

4 Liberty Medical (using their own Blood Glucose Monitoring System)