The Effects of Chicken Extract and a Peptide Supplement for the Prevention of Cognitive Decline in Non-demented Elderly Adults

Inclusion Criteria: * Male or female at 55 - 75 years of age * Baseline cognition: * Normal cognition with feelings of cognitive decline (subjective cognitive decline) OR * Mild cognitive impairment (MCI+) with memory impairment * Agree to participate in the study and provide written informed consent Exclusion Criteria: * Inadequate visual and auditory acuity to allow neuropsychological testing * Significant cerebrovascular disease * History of allergy to chicken meat * Diagnosis of Alzheimer's disease (AD) with dementia or any other dementia * Clinical dementia rating (CDR) score of \> 0.5 at screening * Evidence of other neurological, psychiatric or physical illness that can produce cognitive deterioration per investigator's judgment * Inability or unwillingness to undergo PET scan * Current diagnosis or history of alcoholism or substance addiction * Regular use of any medication in the past 6 months that may affect cognitive functioning * Regular use of cognitive enhancing supplements in the past 6 months * Subjects with excessive blood donation or blood drawn prior to baseline * Persons with a history of cardiovascular disease or any other cardiovascular or cerebrovascular diseases which investigators deem unsuitable to participate in the clinical study.