Inclusion Criteria:  55 to 85 years old inclusive Meets criteria for amnestic Mild Cognitive Impairment defined by education adjusted performance on the Wechsler Memory Scale (WMS) III Logical Memory delayed recall score and clinical evaluation. Medically stable  Exclusion Criteria:  Dementia Significant confounding active neurological/psychiatric disease Participation in an experimental investigational drug trial in the past 30 days Unwilling to restrict consumption of anthocyanin-rich foods Inability to complete cognitive testing (e.g. significant visual or hearing impairment) Allergy or intolerance to blueberries Significant gastrointestinal disorders or surgery that influences digestion and absorption Presence of unstable, acutely symptomatic, or life-limiting illness Women of childbearing potential