You've probably heard of NAD+ by now — it shows up in conversations about longevity, energy, and healthy ageing. But most explanations either drown you in biochemistry or oversell it as a miracle cure. Neither is particularly helpful. Here's what it actually is, why it matters, and what the evidence looks like so far.
NAD+ stands for nicotinamide adenine dinucleotide. That's a mouthful, so most people just call it NAD+. It's a molecule found in every single cell in your body, and it's involved in so many fundamental biological processes that without it, nothing in your cells would work at all. Not energy production. Not DNA repair. Not your body's response to stress.
The reason it's been getting a lot of attention lately isn't because it's newly discovered — scientists have known about NAD+ since the early 1900s. What's changed is that researchers have started to understand more precisely what happens when NAD+ levels drop, and they've been studying whether it's possible to raise them back up.
What Does NAD+ Actually Do?
Think of NAD+ as a kind of molecular courier. It shuttles electrons around inside your cells, which is central to how your mitochondria — the energy-producing parts of your cells — generate ATP, the form of energy your body actually runs on. Without NAD+, your mitochondria can't do their job properly. And when mitochondria underperform, you feel it: fatigue, slower recovery, brain fog, reduced physical stamina.
But energy production is just part of the picture. NAD+ is also required by a family of proteins called sirtuins, which regulate everything from inflammation and DNA repair to how your body handles metabolic stress. And it's needed by enzymes called PARPs, which scan your DNA for damage and coordinate repairs. Every time one of those repair processes kicks in, it consumes NAD+.
The key point: NAD+ isn't just an "energy supplement." It's a molecule your cells need for maintenance, repair, and resilience — not just fuel.
Why Do NAD+ Levels Decline?
Here's where it gets relevant to everyday life: NAD+ levels naturally decline with age. Research in animals has shown drops of around 50% between young adulthood and middle age. Human data is less precise, but the pattern appears to hold.
Several things accelerate the decline beyond normal ageing:
- Chronic stress — activates PARP enzymes constantly, which burns through NAD+ faster than the body can replenish it
- Poor sleep — disrupts the circadian regulation of NAD+ synthesis pathways
- Excess alcohol — directly competes with NAD+ in metabolic processes and depletes reserves
- Sedentary lifestyle — reduces the mitochondrial activity that naturally stimulates NAD+ production
- A diet low in NAD+ precursors — the body makes NAD+ from compounds like niacin (B3), tryptophan, NMN, and NR — if these are scarce, synthesis slows
The result for many people isn't dramatic — it's more of a slow drift: energy that used to recover overnight now takes a few days. Focus that used to be sharp after one coffee now requires more effort. Recovery from physical exertion that took 24 hours now takes 48. These aren't necessarily signs of illness — they can simply be signs that cellular resources are stretched thin.
What Does the Research Say?
It's worth being honest here: much of the most compelling NAD+ research has been done in animal models. The results in mice have been striking — researchers have seen improvements in muscle function, metabolic health, and even lifespan markers after NAD+ precursor supplementation. Human trials are ongoing, but they're younger and smaller.
What the human evidence does support so far:
What it doesn't yet support with strong evidence: dramatic anti-ageing effects in humans, significant cognitive improvements, or any specific disease prevention. The hype around NAD+ has outpaced the science somewhat. That said, the mechanistic reasoning is solid, and the safety profile looks reasonable.
Natural precursors and whole-food compounds that support the body's NAD+ synthesis pathways.
NMN vs NR: Which NAD+ Precursor Is Better?
If you're looking at supplements, you'll mostly encounter two forms: NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside). Both are precursors — meaning your body converts them into NAD+ after you take them. They're not the same as NAD+ itself.
NMN is one step closer to NAD+ in the biosynthetic pathway, which theoretically makes it more direct. NR has more human clinical trial data behind it simply because it's been studied longer. In practice, both appear to raise NAD+ levels when taken orally. The differences in outcome between the two are not yet meaningfully established in humans.
What matters more than which precursor you choose is quality — purity, stability, and manufacturing standards. NAD+ precursors can degrade if improperly stored or manufactured, which means what's on the label and what's in the capsule don't always match at the lower end of the market.
Two Products Worth Considering
If you're looking to support NAD+ levels practically, here are two products from the Creawell Natural Health collection that are worth knowing about.
L Cell NMN Powder – 99.7% Purity
Pharma-grade NMN powder, 99.7% pure, designed as a direct NAD+ precursor for cellular energy, metabolism, and healthy ageing support.
What sets this apart is the purity level — 99.7% is pharmaceutical grade, which matters because NMN degrades easily and lower-purity products may not deliver what they claim. Powder form also allows flexible dosing, which is useful when starting out since most people do better beginning on the lower end and adjusting over time. If you're new to NAD+ precursors, this is a straightforward, no-filler starting point.
L Cell NMN Powder
Shilajit Capsules with Ashwagandha & Piperine
A combination of shilajit resin, ashwagandha root, and black pepper extract — supporting mitochondrial function, stress resilience, and natural energy from a different angle.
Shilajit contains fulvic acid, which research suggests may support mitochondrial function and help transport nutrients into cells more efficiently — a complementary mechanism to direct NAD+ support. Ashwagandha addresses the stress angle: high cortisol is one of the things that depletes NAD+ faster than normal. Together, these two products work through different but related pathways, which is why some people choose to use both rather than picking one.
Shilajit & Ashwagandha
How to Think About NAD+ Supplementation
NAD+ supplementation isn't a shortcut. If your sleep is poor, your diet is lacking B vitamins and tryptophan, and you're chronically stressed — taking NMN won't fix those things. What it might do is give your cells slightly more raw material to work with while you address the other factors.
The people most likely to notice a meaningful difference from NAD+ precursor supplementation are those whose levels have declined significantly — typically people over 40, those who have been under prolonged stress, or those recovering from periods of poor lifestyle habits. Younger, already-healthy people may notice very little change, which is normal.
A few practical points if you decide to try it:
- Start with a lower dose and build up — most protocols begin around 250–500mg of NMN daily
- Morning is generally preferred since NAD+ is involved in circadian rhythms and energy metabolism
- Give it at least 8–12 weeks before drawing conclusions — NAD+ replenishment is not an overnight process
- It's not a replacement for sleep, movement, and a nutrient-dense diet — those remain the foundation
- If you have any existing health conditions or take medications, speak to a doctor first
The honest summary: NAD+ is a genuinely important molecule, the science behind supplementation is plausible and early-stage promising, and the risk profile looks reasonable. It's not a miracle — but it's also not pure hype. For most people, it's worth understanding, and for some, worth trying.