Human RctModerateSupplement
NMN vs NR: what is the difference?
Both NMN and NR are NAD-related precursors, but chemistry, regulation and human evidence need to be kept separate.
Jun 27, 20265 min readNMN / NR
NAD, Supplements & Mitochondria
NMN, NR, NAD IV, urolithin A, taurine, creatine, CoQ10, spermidine, resveratrol, berberine and mitochondrial health claims.
Who this is for
Readers weighing supplement and clinic claims against human endpoints, biomarker changes and regulatory boundaries.
Key questions answered
Does a supplement change a biomarker or a meaningful outcome?
Is the claim about NAD levels, aging, energy or disease?
What evidence exists in humans?
What interactions or quality questions matter?
Featured articles
Human RctModerateSupplement
Do NAD supplements slow aging?
NAD biology is real, but the leap from NAD markers to human aging outcomes is larger than most ads admit.
Jun 27, 20265 min readNAD / supplements
Commercial ClaimModerateUnclear
NAD IV drips: evidence, cost and unanswered questions.
IV NAD clinics sell a high-touch experience, but route of delivery does not solve the outcome-evidence problem.
Jun 27, 20265 min readNAD IV / clinics
UnknownModerateUnclear
The longevity stack problem: why combinations are hard to interpret.
When multiple interventions change at once, impressive stories become hard to assign to any one ingredient.
Jun 27, 20265 min readstacking / supplements
Latest signals
PubMed
Jun 27, 2026
Human RctModerateSupplement
NAD precursor studies still need outcome context
Human NAD precursor papers often report biomarker changes, tolerability or small functional measures.
Those signals can be useful, but they are not the same as proven aging modification.
Glossary
- NAD
- Nicotinamide adenine dinucleotide, a molecule involved in cellular energy and repair pathways.
- Surrogate marker
- A measurement that may point toward a process but does not by itself prove a clinical benefit.
FAQs
Do supplement studies prove lifespan extension in humans?
Human supplement studies usually measure safety, tolerability or biomarkers; lifespan claims require much stronger evidence.