Episodes of severe hypoglycemia—low blood glucose requiring hospitalization—were found to increase the risk of dementia in older people with type 2 diabetes. The study did not look at the relationship between dementia and hypoglycemia that didn’t require hospitalization. Another study found that insulin-related hypoglycemia does not raise the risk of dying after having had a heart attack. Recent clinical trials had suggested that hypoglycemia increases heart attack mortality risk, but they failed to distinguish between insulin-related and spontaneous hypoglycemia, the type caused by severe illness. In the current study, spontaneous hypoglycemia after a heart attack was found to increase the risk of death.
Source: Journal of the American Medical Association, April 15, 2009