There are many reasons why blood glucose is different after breakfast and after lunch, specifically related to individual eating habits, testing time, and different basal blood glucose levels at different times.
1. Individual’s dietary habits: With more sugar intake, blood sugar is higher after meals. Different sugar intake in breakfast and lunch may lead to different blood sugar after breakfast and after lunch.
2. Testing time: After eating, insulin is secreted into the blood quickly to regulate blood glucose, and the blood glucose level half an hour after meal is different from that of one hour after meal. Therefore, the blood glucose measured at different times after meal is not consistent.
3. Different basal blood glucose levels: Generally, the human body has lower blood glucose levels in the morning, which may also be one of the reasons for the inconsistency of blood glucose after breakfast and lunch.
If the blood glucose after breakfast and after lunch is different and the difference is large, you can take several measurements and go to the hospital if necessary to clarify the cause under the guidance of the doctor.