Improving Food Literacy in the Elderly Through an eHealth Education Program Based on Personalized Nutrition

Inclusion Criteria: * Age 65 years and over * Non-institutionalized * Retired from main professional activity or part-time working * Smartphone user. Exclusion Criteria: * Presence of a severe or limiting disease (such as cancer, dementia, advanced Parkinson's disease, or any other serious pathological condition) * Use of a pacemaker or implantable automatic defibrillator * Adherence to a specific prescribed diet for any reason other than a low-sodium, low-fat, or weight-control diet. * Diagnosis of digestive disorders such as celiac disease or Crohn's disease, or any metabolic disease or condition that alters nutritional requirements. * Use of enteral or parenteral nutritional support at home. * Presence of cognitive or psychomotor impairment. * Expectation of institutionalization. * Consumption of more than five main meals per week outside the home