With children, after-meal peaks can be a bit more liberal. Ideally, the blood glucose level at the peak should be below 180 mg/dl, or less than 80 mg/dl higher than it was before the meal. In most cases, blood glucose levels peak about an hour after finishing a meal or snack. Just as a big turkey dinner can turn the peppiest person into a slumbering slug, a rapid rise in blood glucose levels after meals has been shown to affect the ability to concentrate, stay alert, and perform athletically and intellectually. But postprandial hyperglycemia can have more immediate effects as well. Research on the effects of postprandial hyperglycemia has shown an increase in the risk of death from heart disease in those with Type 2 diabetes and earlier onset of kidney disease in those with Type 1. So even though after-meal high blood glucose levels are temporary (often resembling a spike when plotted on a graph), frequent between-meal rises can cause your HbA1c to go up. (To see how HbA1c levels compare to average blood glucose levels, see the table “Blood Glucose and HbA1c Correlations.”) However, research presented in 2004 suggests that a person’s HbA1c correlates closely to his average blood glucose levels during the three hours after - not before - eating. The HbA1c reflects an average of all blood glucose levels at all times of day - before eating, after eating, during the night, etc. But if your after-meal rises are dramatic and occur consistently, they can result in higher HbA1c test results than your premeal blood glucose readings would otherwise indicate, and the higher your HbA1c, the higher your risk of serious diabetes complications. For anyone with diabetes, it is normal for blood glucose to rise somewhat after eating. Postprandial hyperglycemia refers to high blood glucose levels that occur soon after eating meals or snacks. Or maybe you’ve been the victim of postprandial hyperglycemia.
Maybe my blood is different from everyone else’s.” How can my A1c still be so high? My mealtime readings are almost always where they should be. Learn More About Blood Glucose Management >
MEAL TIMING SOLUTIONS SERIES
Thirty minutes later, after a series of careful examinations and a lengthy lecture on the need to get your HbA1c down, you walk out shaking your head. In walks your doctor, with the results of your latest lab work in hand.
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