Benefits of Nicotinamide Riboside Upon Cognition and Sleep

This study is testing whether a supplement called nicotinamide riboside (NR) — a form of vitamin B3 that the body uses to produce cellular energy — can improve both sleep quality and thinking and memory in people who are reporting poor sleep. NR is available as an over-the-counter supplement, but this study is testing it in a controlled research setting to measure its real effects on the brain and sleep. **You may be eligible if...** - You have poor sleep quality, as measured by a standard questionnaire called the Pittsburgh Sleep Quality Index (a global score above 5 indicates poor sleep) - You are an adult willing to participate in the study **You may NOT be eligible if...** - You show signs of dementia or significant memory impairment, as measured by the VA-SLUMS cognitive test (a score below 20 suggests cognitive decline that may affect participation) Talk to your doctor to see if this trial is right for you.