The $40/Month Longevity Stack: 4 Expert-Backed Picks

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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Every major longevity expert — Huberman, Attia, Sinclair, Stanfield, Patrick — takes these 4 supplements. Omega-3 fish oil. Vitamin D3+K2. Magnesium. Creatine. Total cost at budget brands: roughly $40-50/month. That’s about $1.50 a day. This is where I’d tell anyone to start, and these are the 4 I’d never drop from my own stack even if I had to cut everything else.

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

Why These 4 (And Not Others)

I’ve tracked the public supplement routines of over a dozen longevity experts for the past seven years. Most of them disagree on plenty — Sinclair bets big on NMN while Attia doesn’t touch it, Huberman takes a dozen nootropics while Stanfield keeps things minimal. But across all their differences, four supplements show up in virtually every single stack.

That kind of cross-expert consensus is rare. When five people who spend their careers studying human longevity independently arrive at the same four picks, it signals something stronger than any single expert recommendation. You can see the full breakdown of where experts agree and disagree here.

Each of these four has a deep evidence base spanning multiple health domains. None of them are exotic. None of them require a prescription. All of them are dirt cheap. And roughly 50-70% of Americans are deficient in at least one of them.

I mapped out every expert’s full stack in our expert stacks comparison and built an interactive version in the Research Hub. The consensus on these four is striking.

1. Omega-3 Fish Oil ($12-18/month)

Dose: 2-4g combined EPA+DHA per day. Huberman aims for 2g+ EPA specifically. Attia has discussed similar targets on The Drive podcast.

Omega-3 fatty acids do three things that matter for longevity. They reduce systemic inflammation (measured by hs-CRP). They support cardiovascular health — a 2019 meta-analysis in the Journal of the American Heart Association found significant reductions in cardiovascular events. And they contribute to brain health through DHA, which makes up a substantial portion of brain cell membranes.

Most Americans get far too much omega-6 (from seed oils) relative to omega-3. Supplementation corrects that ratio. Dr. Rhonda Patrick has discussed the omega-3 index extensively on FoundMyFitness — she targets an omega-3 index above 8%, which most people can’t hit through diet alone unless they eat fatty fish 4-5 times per week.

Budget pick: Viva Naturals Omega-3 at roughly $14-18/month for 2g+ EPA/DHA daily. Look for IFOS certification on any fish oil you buy — it tests for purity, potency, and freshness. If you want a step up, Sports Research Omega-3 runs about $20/month and has strong third-party testing. I cover dosing details in my omega-3 per day guide.

2. Vitamin D3 + K2 ($8-12/month)

Dose: 2,000-5,000 IU vitamin D3 daily, paired with 100-200mcg vitamin K2 (MK-7 form). Get bloodwork to dial in your exact dose — the goal is a serum 25(OH)D level of 40-60 ng/mL.

Vitamin D is technically a hormone precursor, not a vitamin. Your body produces it from sunlight, but unless you live near the equator and spend significant time outdoors, you’re probably not making enough. Dr. Brad Stanfield has cited estimates that over 40% of Americans are deficient. Attia considers D3 supplementation one of the lowest-hanging fruit interventions in his practice.

The K2 pairing isn’t optional in my book. Vitamin D3 increases calcium absorption from your gut. Without K2, that calcium can deposit in your arteries instead of your bones. K2 activates matrix GLA protein, which directs calcium to bones and teeth where it belongs. The combination costs barely more than D3 alone.

A warning from personal experience: I was taking 40,000 IU/day at one point, based on something I’d read online. My bloodwork showed levels above 90 ng/mL — well above optimal and approaching potentially harmful territory. Bloodwork caught it. I adjusted to 5,000 IU daily and my levels settled into the 50-55 ng/mL sweet spot. Read more about how bloodwork corrected my D3 dosing.

Budget pick: NatureWise D3+K2 at $6-8/month. D3 is one of the cheapest supplements on the market and the molecule is identical across brands. For a mid-tier option, Sports Research D3+K2 runs about $10/month. Full breakdown in my D3+K2 supplementation guide.

3. Magnesium ($8-12/month)

Dose: 200-400mg elemental magnesium daily. Glycinate form for sleep and general absorption. Threonate for cognitive benefits (more expensive).

Magnesium participates in over 300 enzymatic reactions in your body. It affects muscle function, nerve signaling, blood sugar regulation, blood pressure, and protein synthesis. Despite being essential for all of this, an estimated 50% of Americans don’t get enough from diet alone.

Huberman takes both magnesium threonate and glycinate as part of his sleep stack, discussed extensively on the Huberman Lab podcast. Stanfield takes magnesium glycinate. Attia has mentioned magnesium supplementation as a standard recommendation in his practice.

The form matters here. Magnesium oxide is the cheapest but poorly absorbed — only about 4% bioavailability. Citrate is decent for gut motility but can cause GI issues. Glycinate absorbs well, is gentle on the stomach, and has calming properties that make it ideal for evening dosing. I take mine about an hour before bed and the sleep improvement was noticeable within the first week. For a deeper dive, see when to take magnesium for sleep.

Budget pick: Magnesium Glycinate at $8-12/month. If cognitive benefits are your priority and budget allows, Life Extension Magnesium Threonate runs $25-30/month. Full guide: magnesium supplementation guide.

4. Creatine Monohydrate ($5-8/month)

Dose: 5g per day. No loading phase needed. Just 5g daily, every day, forever.

Creatine is the single best value in supplements. At $0.15-0.25 per day, nothing else comes close in cost-to-benefit ratio. Most people know creatine from gym culture, but the longevity research is genuinely compelling.

Dr. Andrew Huberman has discussed creatine’s cognitive benefits multiple times, citing research showing improved working memory and processing speed. Peter Attia includes it in his standard recommendations. A 2018 meta-analysis in Experimental Gerontology found significant benefits for muscle strength in adults over 50 when combined with resistance training.

The brain health angle is what got me interested. Your brain uses creatine for rapid energy recycling in neurons. A 2023 study in Scientific Reports found that creatine supplementation improved cognitive performance under stress. For anyone over 40, the combination of muscle preservation and cognitive support makes creatine almost absurdly underpriced relative to its evidence base.

No, it won’t make you bloated. The “water retention” effect is largely overstated and occurs mostly during a loading phase, which you don’t need to do. I cover the safety data in Is creatine safe over 40?.

Budget pick: Optimum Nutrition Creatine Monohydrate at $5-8/month. This is the simplest purchase on the list. Creatine monohydrate is creatine monohydrate. Buy the cheapest reputable brand and move on. Full guide: creatine longevity guide.

The Budget Shopping List

Call it $40/month at the midpoint. That’s $1.33 per day. Less than a cup of coffee. You can model your own stack costs with our Cost Calculator.

What to Add Next (If Your Budget Allows)

Once you’ve locked in the core four, here’s the order I’d expand in, based on evidence strength and cost efficiency.

CoQ10 / Ubiquinol ($15-20/month): Supports mitochondrial energy production and heart health. Particularly relevant if you take statins, which deplete CoQ10. Qunol Ubiquinol is my pick. I added this to my stack after my father died of heart disease — the cardiovascular data persuaded me. Full guide: CoQ10 guide.

NAC ($8-12/month): N-acetyl cysteine is a precursor to glutathione, your body’s master antioxidant. NOW NAC 600mg is cheap and well-studied. Stanfield includes NAC in his protocol.

NMN ($50-80/month): This is where you enter speculative territory. David Sinclair’s NAD+ precursor of choice, with promising animal data but limited human trials. Renue by Science NMN is a solid option. I take it, but I acknowledge the evidence isn’t as strong as the core four. See supplements experts disagree on for the full debate.

L-Theanine ($6-8/month): If you drink coffee, L-theanine smooths out the jitters and promotes calm focus. Huberman discusses this stack frequently. Cheap, safe, and noticeable from day one.

With these additions, you’d be running an 8-supplement stack for $100-170/month — similar to what I take. See my longevity stack cost breakdown for the full math.

For a complete comparison of how much different experts spend on their stacks — from Stanfield’s $80/month to Johnson’s $2,000+ — check out my expert stack cost comparison.

Not sure where to start? Take the Stack Quiz and get a personalized recommendation based on your goals, budget, and experience level.