Could a simple home sensor reveal how a Vitamin-Like supplement affects Alzheimer's?

This study tests whether a radio-wave sensor placed in the home can measure sleep, movement, and walking speed in 40 people with mild cognitive impairment or mild Alzheimer's who are taking nicotinamide riboside (a form of vitamin B3). The goal is to find digital biomarkers that reflect changes in brain energy metabolism. The study does not test whether the supplement improves symptoms, but rather how well the sensor can track potential effects.