Phospholipid-rich Dairy Extract for Cognitive Function

Inclusion Criteria: * Age: Adults aged 55-85 years (inclusive), both male and female * Global Deterioration Scale (GDS) score of 2-3: GDS 2: Subjective memory impairment without objective evidence GDS 3: Mild objective memory impairment * Absence of dementia according to established diagnostic criteria * Ability to read Korean Exclusion Criteria: * Severe medical conditions within the past 6 months: History of severe cerebrovascular disease (cerebral infarction, cerebral hemorrhage), cardiac disease (angina, myocardial infarction, heart failure, arrhythmia requiring treatment), or malignancy (Note: Participants with a history of cerebrovascular or cardiac disease who are clinically stable may be included at the investigator's discretion) * Cognitive impairment-associated diseases: Dementia, Parkinson's disease, cerebral infarction, or other conditions associated with cognitive decline Uncontrolled hypertension: Blood pressure ≥160/100 mmHg (measured after 10 minutes of rest) * Poor glycemic control: Fasting blood glucose ≥160 mg/dL in diabetic patients * Uncontrolled thyroid dysfunction: Currently receiving treatment for uncontrolled hypothyroidism or hyperthyroidism * Renal impairment: Serum creatinine ≥2 times the upper limit of normal for the institution * Hepatic impairment: AST or ALT ≥2 times the upper limit of normal for the institution * Severe gastrointestinal symptoms: Complaints of severe heartburn, dyspepsia, or other gastrointestinal distress * Medications affecting cognitive function within the past month: Use of drugs (antipsychotics, anti-degenerative agents, cognitive enhancers, tricyclic antidepressants, hormone replacement therapy) or health functional foods that may influence cognitive function due to dementia or other cognitive abnormalities * Other clinical trial participation: Participation in other drug clinical trials within the past month or planned participation during the study period * Alcohol abuse * Food allergies: Known allergic reactions to study product components * Investigator discretion: Any other condition deemed inappropriate for study participation by the investigator