RecruitingDevice studyPassive Sensor Identification of Digital Biomarkers to Assess Effects of Orally Administered Nicotinamide RibosideThis project's main goal is to use state-of-the-art passive sensing techniques to identify digital biomarkers that relate to bioenergetic changes in the brain due to nicotinamide riboside supplementation in those with mild cognitive impairment and mild Alzheimer's dementia.