We're not sure if boosting NAD+ actually helps people feel younger or healthier — studies have mixed or unclear results.

What we've found so far is that there is limited clarity on whether NAD+ supplementation improves anti-aging or wellness outcomes in humans. The evidence we've reviewed does not provide a clear answer, and results from available studies are mixed or inconclusive [1]. Our analysis of the available research shows that while NAD+ levels decline with age, and boosting them is a popular idea for slowing aging, we do not yet have strong evidence that this actually helps people feel younger or healthier [1]. The 28.0 assertions we analyzed all support the idea that more research is needed, as current findings are not consistent enough to draw firm conclusions [1]. No studies in our review refuted the idea, but absence of refutation does not mean support for effectiveness. We looked at what has been studied so far, and while some early research in cells or animals suggests potential mechanisms, human data remains unclear. This means we cannot say, based on what we've reviewed, that NAD+ supplements deliver measurable wellness or anti-aging benefits in people. The idea is biologically plausible, but plausibility is not the same as proof. Our current analysis shows that the evidence leans toward uncertainty. We do not have enough consistent human data to determine whether taking NAD+ supplements leads to meaningful improvements in how people age or feel over time. Some people may experience effects, but we cannot tell if those are due to the supplement or other factors. Takeaway: If you're considering NAD+ supplements for anti-aging or wellness, know that science hasn’t yet shown they work for this in people — but research is ongoing. What we know today may change as more evidence comes in.