Age-related NAD+ decline

This 2020 study looked at whether NAD+, a molecule cells use for energy and repair, changes with age. The available record does not say how many people took part, which tissues were tested, or exactly how the study was done. Its title suggests that NAD+ fell with age. It did not show that taking NAD+ supplements reverses aging or improves health.

What this means for you: This finding alone is not a reason to buy NAD+ supplements. It suggests an age-related change, but does not prove that changing NAD+ will help people live longer or healthier.