A Scalable Nutrition Adherence Intervention

Inclusion Criteria: * Ages 55-85 * converted telephone MoCA total score: MCI = 17 ≤ 26, CN= ≥27 and/or and/or MCS MCI≥3, CN\<3 * interest in participating in a nutrition program * stable medical condition (at least 3 months prior to screening visit) at the discretion of study physician * stable on medications if any (at least 4 weeks prior to screening visit) at the discretion of study physician * able to complete the required assessments Exclusion Criteria: * MoCA ≤ 16, or diagnosis of neurodegenerative illness (except MCI or early AD in the MCI group) * current evidence or history in the last 1 year of focal brain lesion, head injury with loss of consciousness, or any major psychiatric disorder including psychosis, bipolar disorder, severe major depression (PHQ-9 \> 20), alcohol or substance abuse, or disordered eating symptoms (SCOFF \> 2) * sensory impairment (visual or auditory) that might preclude participant from participating in the study * serious medical risk or organ failure, such as type 1 diabetes mellitus, recent cardiac event (e.g. heart attack, angioplasty) * prescribed Warfarin, insulin, or immunosuppressants * use of medications including anticonvulsants, drugs with potential interfering CNS effects (except cholinesterase inhibitors or memantine), and medications with known anticholinergic activity * a nut or fish allergy (does not include shellfish) * current use of highly restrictive or specialized diet regimen (e.g., vegan, use of MAOIs etc.) * major d…