Validation of NAD+ Measurements for Human Clinical Studies

You may be eligible if

• Male or female age18-35 years or 70 years or older, healthy
• if female reproductive potential, use of highly effective contraception (at least 1 month prior to screening and during study participation).
• No known sensitivity to NR
• No use of niacin, blood thinners or chemotherapy agents
• HbA1c below 8.5% and not diabetec requiring insulin.
• Not using/taking corticosteroids
• No laboratory abnormalities indicating significant anemia, bleeding risk, kidney disease, or liver disease
• No contraindication to MRI
• Not Pregnant, lactating, or planning to become pregnant during participation
• Not taking multivitamins or any over-the-counter supplements except calcium and vitamin D (any other supplements - discontinued 2 weeks prior to study participation).
• not taking/ undergoing another investigational drug or other intervention within the past 30 days.