Soluble Corn Fiber for Promoting Executive Function Study

Inclusion Criteria: 1. 45-75 years of age 2. Free of cognitive impairment (Mini-Mental State Examination score of higher than 24) 3. Absence of neurological disease 4. Absence of gastrointestinal diseases 5. Absence of prediabetes or diabetes 6. No color blindness 7. Have normal or corrected-to-normal vision 8. No history of antibiotics or smoking over the past 3 months 9. Agree to refrain from taking pre-or probiotic supplements during the study 10. Agree to inform researchers of any changes in chronic medications during the study 11. Body Mass Index (BMI) between 18.5 to 34.9 kg/m2 12. Habitual dietary fiber consumption of ≤12g/d (women) and ≤19 g/d (men) based on DHQ II 13. Not consuming an extreme dietary pattern (e.g., vegan, keto, low FODMAP) 14. No allergies to corn or maltodextrin, eggs, peanuts, tree nuts, wheat and soy 15. Agree to maintain habitual dietary patterns throughout the study period 16. Maintain their current level of physical activity 17. Complete all necessary study questionnaires and to provide stool specimens as required. Exclusion Criteria: 1. \<45 or \>75 years of age 2. Presence of cognitive impairment (Mini-Mental State Examination score of lower than 24) 3. Presence of neurological disease 4. Presence of gastrointestinal diseases 5. Presence of prediabetes or diabetes 6. Color blindness 7. Non normal or uncorrected vision 8. History of antibiotics or smoking over the past 3 months 9. Not agree to refrain from taking pre- or probiotic supplements during the study 10. Not agree to communicate any changes in chronic medications during the study 11. Body Mass Index (BMI) below 18.5 or greater than 34.9 kg/m2 12. Habitual dietary fiber consumption of \>12g/d (women) and \>19 g/d (men) based on DHQ II 13. Consuming an extreme dietary pattern (e.g., vegan, keto, low FODMAP) 14. Allergies to corn and/or maltodextrin 15. Not agree to maintain habitual dietary patterns throughout the study period 16. Not agree to maintain their current level of physical activity 17. Not agree to complete all necessary study questionnaires and to provide stool specimens as required.