How Sinclair’s Supplement Stack Has Changed (2020-2026)

Mike HartnettEvidence-Based

7+ years researching longevity protocols. Runs a 20+ supplement daily stack. Built CoreStacks after losing his father to heart disease.

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David Sinclair is the most public longevity researcher alive. His supplement stack has evolved significantly since he first shared it around 2019-2020. Some additions reflect new research. Some adjustments suggest that even the loudest NMN advocate in the world updates his thinking. I’ve tracked his public statements across podcasts, interviews, and social media over the past six years. Here’s what stayed, what changed, and what it means for your own stack.

One caveat before we start: Sinclair hasn’t published a comprehensive, date-stamped supplement list. What follows is reconstructed from his public interviews, podcast appearances, his book Lifespan, and social media posts through early 2026. His actual current stack may differ from what he’s discussed publicly.

The Original Sinclair Stack (~2019-2020)

When Sinclair first gained mainstream attention through his book Lifespan and appearances on Joe Rogan and other major podcasts, he shared a relatively straightforward supplement protocol:

• NMN — 1g every morning. The centerpiece. Sinclair’s research on NAD+ decline and its role in aging was the scientific foundation for NMN supplementation. He takes it first thing in the morning on the theory that NAD+ peaks should align with circadian rhythm.
• Resveratrol — 1g every morning with yogurt. Sinclair’s other signature supplement. He specifically takes it with a fat source (full-fat yogurt) because resveratrol is fat-soluble and absorption improves dramatically with dietary fat. His early sirtuin research was what put resveratrol on the longevity map.
• Metformin — 1g daily (skipped on exercise days). The prescription diabetes drug repurposed for longevity. Sinclair discussed metformin as an AMPK activator that mimics some caloric restriction benefits. He skipped it on exercise days based on emerging data about blunted exercise adaptations.
• Vitamin D — daily. Standard supplementation, nothing unusual here.
• Statin. Sinclair has mentioned taking a statin for cardiovascular risk, which is a pharmaceutical decision rather than a supplement one.

This was the stack that launched a thousand NMN orders. When a Harvard genetics professor tells the world he takes a specific supplement every morning, people notice. NMN sales exploded. Resveratrol saw a second wave of interest after years of being considered a failed supplement. The full Sinclair protocol breakdown covers the rationale for each component.

What Has Stayed Consistent

Two supplements have remained constant throughout every public discussion of Sinclair’s protocol:

NMN has never wavered. Through every interview, every podcast, every public appearance, NMN remains the foundation. Sinclair’s commitment makes sense given that his professional reputation is substantially tied to NAD+ research. But longevity of conviction aside, the consistency signals that he’s either seeing personal biomarker improvements or remains deeply convinced by his own research. Probably both.

Resveratrol has stayed too. This is arguably more interesting. Resveratrol has faced significant scientific criticism since Sinclair’s early sirtuin work. The compound’s poor bioavailability is well-documented. Several experts have moved away from it. Huberman doesn’t take it. Attia doesn’t take it. Stanfield reviewed the evidence and skipped it. I dropped it myself after months of no noticeable benefit.

Yet Sinclair persists with resveratrol. His continued use suggests either personal data we don’t see, conviction in his original research, or both. His yogurt-based delivery method has also been consistent, addressing the bioavailability criticism at least partially.

Vitamin D has remained throughout as well, which is unremarkable — virtually every longevity expert supplements vitamin D.

Known Adjustments and Additions

Based on Sinclair’s public statements across interviews and social media through early 2026, several adjustments and additions have surfaced:

TMG (Trimethylglycine) — Added as NMN Companion

Sinclair has discussed adding TMG to his protocol. The rationale: NMN’s conversion to NAD+ consumes methyl groups. Chronic NMN supplementation could theoretically deplete methyl donors, which are needed for DNA methylation and other critical processes. TMG provides methyl groups to compensate.

This is a thoughtful addition that shows Sinclair thinking about second-order effects. Most NMN users don’t take TMG, and it’s unclear how significant the methyl group depletion actually is. But for someone taking 1g of NMN daily for years, the precautionary logic makes sense. TMG is cheap — about $10-15/month — so the cost is minimal.

Spermidine — Autophagy Focus

Sinclair has mentioned spermidine in the context of autophagy promotion. Spermidine is found naturally in foods like wheat germ, aged cheese, and fermented soybeans. Supplemental spermidine has gained attention for its potential to enhance cellular cleanup processes — the recycling of damaged proteins and organelles.

The spermidine data in humans is early but interesting. Epidemiological studies have associated higher dietary spermidine intake with lower cardiovascular mortality. A few small clinical trials have shown improved cognitive function in older adults. It fits Sinclair’s pattern of adopting compounds with strong mechanistic rationale and emerging human data.

Quercetin and Fisetin — Senolytic Properties

Sinclair has discussed quercetin and fisetin in the context of senolytics — compounds that selectively clear senescent (damaged, “zombie”) cells. Senescent cells accumulate with age and secrete inflammatory molecules that damage neighboring healthy cells. Clearing them is one of the most promising approaches in aging research.

Quercetin and fisetin are both plant flavonoids with senolytic properties demonstrated in cell culture and animal studies. They’re typically taken intermittently (not daily) in senolytic protocols, unlike the daily NMN and resveratrol. The human evidence for senolytic supplementation is still in early clinical trials.

Metformin Timing — The Exercise Adjustment

Sinclair’s handling of the metformin-exercise data is noteworthy. When studies showed metformin blunted exercise adaptations, Attia stopped taking it entirely. Sinclair’s response was different — he kept metformin but skips it on exercise days. Same data, different conclusions.

This reflects a broader difference in how these experts weigh tradeoffs. Attia treats exercise as the dominant longevity intervention and won’t compromise it. Sinclair appears to weigh the longevity benefits of metformin (AMPK activation, caloric restriction mimicry) as worth preserving on non-exercise days. The debate around metformin is one of the biggest disagreements in the field.

What Sinclair’s Changes Tell Us

Three lessons stand out from tracking Sinclair’s protocol evolution:

Even the world’s foremost NAD+ researcher adjusts. Sinclair hasn’t thrown out his core protocol, but he’s added supplements that address potential downsides of his existing stack (TMG for methyl depletion) and adopted new categories of intervention (senolytics). If someone with his level of access to research is still tweaking, you should be too.

Additions outpace removals. Sinclair’s stack has grown over time, not shrunk. This is the opposite of my own trajectory and Attia’s general philosophy. Sinclair appears to view each new compound as additive — if the mechanism is sound and the risk is low, add it to the protocol. Compare this to Johnson’s maximalism versus Attia’s minimalism.

Personal conviction matters in supplementation. Sinclair’s continued use of resveratrol despite broad expert skepticism shows that personal data and deep familiarity with the research can sustain choices that look questionable from the outside. He knows the resveratrol data better than anyone alive. If he’s still taking it, he has reasons we may not fully understand from public statements alone.

My own stack went in the opposite direction. I started with more supplements and cut down to 8 as I learned more. I detail the full journey and the mistakes that taught me the most. The lesson is that there’s no single correct trajectory — Sinclair’s stack grew because he added targeted interventions, while mine shrank because I removed things I couldn’t feel or measure.

How Sinclair’s Stack Compares to Other Experts

Sinclair’s stack is distinctive because it’s built around his own research themes: NAD+ metabolism (NMN), sirtuin activation (resveratrol), and cellular cleanup (spermidine, senolytics). Other experts build stacks around clinical evidence hierarchies. Neither approach is wrong — they just reflect different relationships with the data.

For a full side-by-side comparison of all six experts, the expert stacks compared hub page has the complete breakdown. The Research Hub tool lets you compare any expert’s stack to any other in real time. You can also see where Huberman and Attia split specifically on NMN.

What This Means for Your Stack

If you’re building a stack influenced by Sinclair, a few practical considerations:

Start with the consensus supplements, not the Sinclair-specific ones. Omega-3, vitamin D3+K2, magnesium, and creatine have dramatically more clinical evidence than NMN or resveratrol. Sinclair takes these basics too.

If you add NMN, consider TMG alongside it. Sinclair’s logic on methyl group depletion is sound. TMG is inexpensive and addresses a plausible concern with chronic NMN use. At 500mg of NMN, the depletion effect is smaller than at Sinclair’s 1g dose, but TMG is cheap insurance.

Don’t blindly copy the full Sinclair stack. Metformin requires a prescription and physician oversight. Senolytic protocols are experimental. Resveratrol is the most questioned supplement in his lineup. Take what works from his reasoning and apply your own evidence threshold.

Treat your stack as a living document. Sinclair updates his. I’ve updated mine — dropping resveratrol and zinc, keeping NMN and CoQ10. Use bloodwork to track what’s actually moving the needle for your body.

If you want to see how Sinclair’s costs stack up against other expert protocols, I’ve compared the real numbers in my expert stack cost comparison. The Cost Calculator lets you toggle individual supplements on and off to see what each expert’s approach would cost you.

This content is for informational purposes only. Consult your healthcare provider before starting any supplement protocol.