David Sinclair's NMN Stack: What He Said on DOAC March 2026
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On March 23, 2026, Harvard genetics professor Dr. David Sinclair appeared on Steven Bartlett’s The Diary Of A CEO for a two-and-a-half hour conversation about one question most people treat as settled: do we have to age the way we expect to?
His answer — backed by 30 years of research — is no.
But buried inside a wide-ranging conversation about gene therapy, cellular identity, and human trials beginning next month, Sinclair said something direct and practical that most listeners glossed over.
At timestamp 1:52:33, when asked about his personal supplement stack, he said:
“There are some basics that I do. If you’re not doing them, it is very wise: make sure you’re not deficient in vitamin D, take NMN, resveratrol, berberine. Spermidine, glycine.”
Three of those supplements — NMN, resveratrol, and berberine — are available in liposomal form from Genevity+. This post breaks down exactly what Sinclair said, the science behind each molecule, and why delivery method matters.
Who is David Sinclair and why does his opinion on NMN matter?
David Sinclair, A.O., Ph.D. is a Professor of Genetics at Harvard Medical School and co-Director of the Paul F. Glenn Center for Biology of Aging Research. He has spent three decades researching why cells age and whether that process can be slowed — or reversed.
He is not a supplement influencer. He is one of the most cited aging researchers in the world, and when he names specific molecules on a platform with millions of listeners, it carries weight.
His book Lifespan: Why We Age — And Why We Don’t Have To became a New York Times bestseller. His research on sirtuins and NAD+ precursors is the foundational science behind the current NMN supplement category.
The Information Theory of Aging: why your cells get old
To understand why Sinclair takes NMN, you need to understand his core theory.
Sinclair believes aging is not primarily about damage to your DNA — it’s about the loss of information that tells your cells what to do. He calls this the Information Theory of Aging.
Here’s how he explained it to Steven Bartlett:
“Aging is an identity crisis of the cells. The genes are still there, in large part. But the control systems — the labels that tell a cell which genes need to be on and which should stay off — get erased over time.”
Your DNA is essentially a library. The books are still there. But the cataloguing system — the epigenome — gets corrupted as you age. Cells start to forget what kind of cell they are. A nerve cell starts looking more like a skin cell. A skin cell starts looking more like a nerve cell. Function declines. Aging accelerates.
What Sinclair’s lab has actually achieved
The March 2026 episode carries new significance. Sinclair disclosed that his lab is preparing to begin the first human trials to reverse aging within weeks of the broadcast.
The technology: three specific genes delivered into the optic nerve that reset the biological age of cells by approximately 75% over six to eight weeks — then stop. In mice, the same approach has been applied to the brain, skin, hearing, multiple sclerosis, and motor neuron disease — using the same set of genes each time.
Sinclair put the longer timeline plainly: “I now believe in my lifetime I’m going to see medicines on the market that reset the age of the body.”
Why Sinclair takes NMN: the NAD+ connection
While the gene therapy work represents the frontier, Sinclair’s practical recommendation for right now centres on NAD+.
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme present in every living cell. It is essential for DNA repair, cellular energy production via mitochondria, metabolic regulation, and inflammation control.
The problem: NAD+ levels decline with age at a predictable rate. By your 50s, you have roughly half the NAD+ you had at 20. According to Sinclair’s research, this is not a side effect of aging — it is one of the primary drivers of it.
NMN (nicotinamide mononucleotide) is the most direct dietary precursor to NAD+. When you take NMN, your cells convert it into NAD+ through a single enzymatic step, raising systemic NAD+ levels.
A 2025 trial published in Nature Metabolism found that NMN supplementation doubled circulating NAD+ levels in humans within 14 days. A separate randomised controlled trial found that biological age did not increase in the NMN group over the study period, while the placebo group measurably aged.
What Sinclair said about resveratrol
Resveratrol is a polyphenol found in red grapes and berries. Sinclair has taken 1g daily for years alongside NMN.
The mechanism: resveratrol activates sirtuins — the same proteins that fasting and exercise activate. Sirtuins are the enzymes responsible for maintaining epigenetic order, repairing DNA breaks, and regulating cellular identity. They require NAD+ to function.
In Sinclair’s framework, NMN and resveratrol work together: NMN raises NAD+ levels, and resveratrol activates the sirtuins that use that NAD+ for repair. He has described resveratrol as the “accelerator pedal” for sirtuin activity.
What Sinclair said about berberine
Berberine works through a different pathway: AMPK activation.
AMPK is an enzyme that acts as a cellular energy sensor. When activated, it mimics the metabolic effects of caloric restriction — the most reliably longevity-extending intervention in animal research. Sinclair describes berberine as “nature’s metformin” — a natural, accessible alternative to a prescription drug that activates the same longevity pathway.
Human trials show benefits for blood sugar regulation, insulin sensitivity, and reduced chronic inflammation — all of which are accelerants of biological aging when unaddressed.
Why liposomal delivery matters for all three
Standard NMN, resveratrol, and berberine all face the same absorption challenge: they are partially broken down in the digestive tract before reaching the bloodstream, reducing the amount of active ingredient that reaches your cells.
Liposomal delivery addresses this by encapsulating the active molecule in a lipid layer that mirrors the structure of your own cell membranes. Rather than being metabolised in the gut, the liposome merges directly with the cell membrane and delivers the molecule inside.
A 2025 study comparing liposomal NMN with standard NMN found that the liposomal group achieved significantly higher blood NAD+ levels by week four.
Genevity+ uses true liposomal encapsulation with 99%+ purity NMN, and every batch is third-party lab tested. This is why it’s not the cheapest option available — and why the absorption profile is meaningfully different from standard capsule alternatives.
Sinclair’s full supplement stack (March 2026)
| Supplement | Purpose | Sinclair’s dose |
|---|---|---|
| NMN | NAD+ precursor, sirtuin fuel | 1g daily |
| Resveratrol | Sirtuin activation | 1g daily |
| Berberine | AMPK activation, glucose metabolism | Not specified |
| Spermidine | Autophagy (cellular cleanup) | ~1–2mg |
| Glycine | DNA methylation support | Not specified |
| Vitamin D3 + K2 | Immunity, cardiovascular | Not specified |
| TMG | Methyl donor (supports NMN metabolism) | 500mg–1g |
Of these, NMN, resveratrol, and berberine are the three he described as basics — the ones he said “if you’re not doing them, it is very wise” to start.
How long does NMN take to work?
Most people notice changes in energy stability and mental clarity within 2–4 weeks. The deeper cellular benefits — measurable changes in biological age markers — appear in studies at 8–12 weeks.
NMN is not a stimulant. The effects are gradual and cumulative. Sinclair himself notes that many supplements may work best cycled — taken every other day rather than daily — to preserve the signalling contrast that makes them effective. If you’re new to NMN, starting with daily use for 8–12 weeks is appropriate before experimenting with cycling.
Frequently asked questions
What NMN does David Sinclair take?
Sinclair takes 1 gram of NMN daily, typically in the morning. He takes it alongside resveratrol, which he mixes with yogurt or olive oil to improve absorption.
Did David Sinclair talk about NMN on DOAC in 2026?
Yes. On the March 23, 2026 episode of The Diary Of A CEO with Steven Bartlett, Sinclair named NMN, resveratrol, and berberine as the three supplements he considers basics for longevity. The episode is titled “Can Aging Be Reversed? After 8 Weeks, Cells Appeared 75% Younger In Tests.”
Is liposomal NMN better than regular NMN?
Standard NMN raises NAD+ levels reliably — all the major clinical trials used standard form. Liposomal NMN shows higher blood NAD+ levels in direct comparisons, likely because more of the molecule survives the digestive process intact. A 2025 comparison study showed meaningful differences by week four.
What is the Information Theory of Aging?
David Sinclair’s Information Theory of Aging proposes that aging is caused primarily by the loss of epigenetic information — the cellular control system that tells genes when to turn on and off — rather than damage to DNA itself. As cells lose this information, they lose their identity and function poorly. Sinclair summarised it on DOAC: “Aging is an identity crisis of the cells.”
Why does Sinclair take resveratrol with NMN?
NMN raises NAD+ levels. Resveratrol activates sirtuins, which are the enzymes that use NAD+ for DNA repair and epigenetic maintenance. Taking them together means you’re both fuelling the system (NMN) and activating the mechanism that uses that fuel (resveratrol).
What is berberine and why does Sinclair recommend it?
Berberine is a natural compound that activates AMPK, a cellular energy sensor that mimics the effects of caloric restriction. Sinclair describes it as a natural alternative to metformin. Human trials show benefits for blood sugar regulation, insulin sensitivity, and metabolic health — all factors that influence biological aging rate.
The bottom line
The March 2026 DOAC episode is the most current, most watched, and most specific endorsement of NMN supplementation from the researcher who built the scientific case for it.
Sinclair is not a supplement salesperson. He is a Harvard professor telling his audience that the basics — NMN, resveratrol, berberine — are things you should be doing if you care about how you age.
Genevity+ was built around exactly these three molecules in liposomal form, third-party tested, before most people had heard of NAD+. Shop the Genevity+ longevity stack here.