Vitamin K and Cognition in Coronary Heart Disease (NutriCog)

Inclusion Criteria: * Men and women * Age 60 years and older * Medically documented stable Coronary Heart Disease (CHD) * Daily dietary intakes of phylloquinone \<150 mcg * Non-consumption of vitamin K supplements (i.e. K1 or K2, singly or in combination with other nutrients), or other cognitive aids * Good French or English understanding * Physical exercise not exceeding 2.5 hours/week of moderate to vigorous aerobic activity * Capacity and willingness to sign informed consent Exclusion Criteria: * Recent acute coronary syndrome (\<3 months) or recent coronary revascularization (bypass surgery or percutaneous coronary intervention, \<3 months) * Known left ventricular dysfunction (LVEF \< 40%) or chronic heart failure * Recent modification of medication (\<2 weeks) * Warfarin (Coumadin) use * Cognitive impairment (based on telephone version of the Mini-Mental State Examination test, score \<19/23) * Diagnosis of depression or uncontrolled anxiety * Malabsorption disorder (advanced liver disease, Crohn's disease) * Patient with auditory or vision impairments not properly corrected by glasses or hearing aids * Unable to read the informed consent form or unable to understand the oral explanations provided by the assessor