A new study found that post-meal blood sugar spikes may contribute to Alzheimer's disease. A new study found that experiencing post-meal blood sugar spikes could potentially increase the risk of Alzheimer’s disease. What the Researchers FoundWhile there is a well-established association between blood sugar spikes and Alzheimer’s, the specific nature of the relationship has remained fuzzy. The team found that postprandial hyperglycemia—high blood sugar after a meal—was significantly associated with an increased risk of Alzheimer’s dementia. Why Would Blood Sugar Spikes Increase Alzheimer's Risk?