NAD+ levels decline significantly with age, and this decline is increasingly understood to be causally involved in many of the functional changes associated with getting older, including reduced energy, slower recovery, and impaired cellular repair. This article explains what NAD+ does, why levels fall, and what the evidence shows about supporting them.
What NAD+ Does in the Body
Nicotinamide adenine dinucleotide (NAD+) is a coenzyme present in every cell. It is an essential component of the electron transport chain, the cellular machinery that converts nutrients into ATP. Without NAD+, ATP production cannot proceed. Beyond energy metabolism, NAD+ is a required substrate for sirtuins (proteins involved in DNA repair, gene expression, and cellular stress resistance) and PARP enzymes (responsible for DNA repair following oxidative damage).
How Much Do NAD+ Levels Decline?
Research published in Cell Metabolism demonstrated that NAD+ levels in muscle tissue fall by approximately 50 percent between early adulthood and middle age. Subsequent human studies have confirmed similar age-related trajectories. This decline is not simply a marker of ageing. Evidence from multiple research groups suggests it is causally involved in reduced physical capacity, impaired cognition, and increased inflammatory signalling.
Sirtuins: The Longevity Pathway
Sirtuins require NAD+ to function. When NAD+ levels decline, sirtuin activity falls proportionally. Research at Harvard Medical School published in Cell demonstrated that restoring NAD+ levels in aged mice reactivated muscle sirtuin pathways and improved mitochondrial function to levels comparable to younger animals.
Resveratrol and Quercetin
Resveratrol is a polyphenol that activates SIRT1 as a sirtuin activator and has been extensively studied for its interaction with the NAD+-sirtuin pathway. Quercetin has demonstrated senolytic properties (clearing senescent cells) and inhibits CD38, an enzyme that degrades NAD+. Research in EBioMedicine found quercetin-based interventions reduced senescent cell burden in human subjects with improvements in physical function. The AE·ORA RENEW NAD+ formula combines NAD+ 500mg with Quercetin 250mg and Resveratrol 150mg at 98% purity to address both NAD+ supply and downstream sirtuin activation simultaneously.
Frequently Asked Questions
Quick answers to the questions readers most often ask.
What causes NAD+ levels to decline with age?
Multiple factors contribute: declining NAMPT enzyme activity (rate-limiting enzyme in NAD+ synthesis), increased CD38 activity (NAD+ degrading enzyme), accumulated DNA damage requiring increased PARP activity (NAD+ consuming), and reduced dietary precursor intake. The net result is a progressive NAD+ deficit that accelerates in midlife.
Can you increase NAD+ levels with supplements?
Yes. Both NAD+ and its precursor NMN have been shown in human clinical trials to raise blood and tissue NAD+ levels. The 2021 Science trial found that oral NMN significantly increased muscle NAD+ levels. Other studies confirm oral NAD+ supplementation raises blood NAD+ over several weeks.
What are the symptoms of low NAD+ levels?
Low NAD+ is associated with fatigue, slower recovery from exercise, reduced cognitive function, impaired metabolic efficiency, and reduced cellular resilience to stress. These are also general features of ageing, which is why the causality is difficult to isolate, but the mechanistic links are well-established.
Does resveratrol boost NAD+?
Resveratrol does not directly raise NAD+ levels. It activates sirtuins, which require NAD+ as a cofactor. The combination of NAD+ or NMN (to raise NAD+ levels) with resveratrol (to activate the sirtuin pathway that uses NAD+) is therefore more effective than either alone. This is the rationale for the AE·ORA RENEW NAD+ formulation.
Is NAD+ or NMN better for energy?
NMN is generally considered a more efficient NAD+ precursor because it enters the NAD+ synthesis pathway through a shorter enzymatic route. NAD+ taken orally is partially broken down before being reassembled intracellularly. Both raise NAD+ levels; NMN may be more efficient per milligram, while NAD+ formulations can include complementary compounds like quercetin and resveratrol.
References
This article references peer-reviewed clinical research. Click through to read the source studies on PubMed.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
