ALA-enriched Nutrition for Prevention of Cognitive Decline in APOE4 Older Adults

Inclusion Criteria: * Age 60 years or older * Have amnestic Mild Cognitive Impairment (MCI) - memory problems that do not interfere with daily life. * Carry at least one APOE4 gene allele (determined by a blood test). * Be fluent in English or Spanish. * Have a study partner (family member or friend) who can provide information about daily function. * Have the ability to give informed consent and comply with study visits and procedures. Exclusion Criteria: * A diagnosis of dementia or any other brain disease that significantly affects thinking or memory (e.g., Alzheimer's disease, Parkinson's disease, schizophrenia, epilepsy, traumatic brain injury). * History of stroke or other major neurological condition. * Short life expectancy due to end-stage disease or other serious medical condition. * Active cancer treatment that could interfere with study participation. * Allergy or sensitivity to flaxseed oil or corn oil. * Current use of flaxseed, flax oil, or fish oil supplements more than once per week. * MRI contraindications, such as pacemakers, metallic implants, or severe claustrophobia. * Current or past history of prostate cancer, regardless of remission status, OR a prostate-specific antigen (PSA) level \> 20 ng/mL at screening. * Use of experimental Alzheimer's treatments (e.g., amyloid monoclonal antibodies) unless on a stable regimen as confirmed by the treating physician.