Aronia and Cognitive Fitness

Inclusion Criteria: * Men and women, aged between 55-75 years * BMI between 25-35 kg/m2 * Fasting plasma glucose \< 7.0 mmol/L * Fasting serum total cholesterol \< 8.0 mmol/L * Fasting serum triacylglycerol \< 4.5 mmol/L * Systolic blood pressure \< 160 mmHg and diastolic blood pressure \< 100 mmHg * Stable body weight (weight gain or loss \< 3 kg in the past three months) * Willingness to give up being a blood donor from 8 weeks before the start of the study, during the study and for 4 weeks after completion of the study * No difficult venipuncture as evidenced during the screening visit Exclusion Criteria: * Smoking or smoking cessation \< 12 months * Presence of diabetes mellitus * Active cardiovascular disease like congestive heart failure or cardiovascular event * Severe medical conditions, including asthma, chronic obstructive pulmonary disease (COPD), kidney failure, auto-inflammatory diseases or rheumatoid arthritis * Unstable body weight (weight gain or loss \> 3 kg in the past three months) * Use of dietary supplements or medication affecting the main outcomes of the study * Use of an investigational product within another biomedical intervention trial within the previous month * Contra-indications for MRI imaging (e.g., pacemaker, surgical clips/material in body, metal splinter in eye, claustrophobia) * Left-handedness * Familial hypercholesterolemia * Abuse of drugs * More than 3 alcoholic consumptions per day * Use medication to treat blood pressure, lipid or glucose metabolism