The Longevity Supplements Worth Taking for Healthy Aging

What “Longevity Supplements” Actually Mean

Walk into any supplement aisle and you will see the same shiny words: anti-aging, cellular renewal, age reversal. Most longevity content lists 15 compounds with a paragraph each and leaves you no closer to a routine you can actually follow.

We think about this differently. The goal is healthspan, not just lifespan: the number of years you feel strong, sharp and energetic. Recent biology of aging research has zeroed in on a handful of things that drive the felt experience of getting older — your cells losing energy, natural antioxidant levels dipping, waste products accumulating, and repair processes slowing down. The supplements with the strongest research target those specific processes.

This is the science-backed list of longevity supplements worth knowing, plus the daily stack we actually recommend. Our work at Bulletproof has centered on what supports steady cellular performance over time: rigorously tested coffee, Brain Octane C8 MCT oil, grass-fed collagen proteins and the supplements we stack alongside them. Everything below is filtered through one question: what would we put in our own daily routine?

The 8 Longevity Supplements With the Strongest Recent Evidence

We curated this list using two filters. First, the compound has at least one quality 2021+ human study (randomized trial or systematic review). Second, the mechanism connects to one of the cellular hallmarks of aging. Results may vary by age, dose and baseline health.

NAD+ Precursors (NMN and NR)

NAD+ is a molecule your body relies on to keep cells running and to help them repair everyday wear and tear. Levels decline steadily with age, which is exactly why NAD+ precursors became the breakout longevity category of the last few years.

The two main precursors are NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside). A 2024 systematic review and meta-analysis of nine human studies covering 412 participants found that NMN significantly improved muscle mass and muscle function, reduced insulin resistance and lowered liver enzyme markers in middle-aged and older adults.^[1] A separate 12-week randomized trial in adults aged 65-75 found that 250 mg per day of NMN significantly increased blood NAD+ levels, improved 4-meter walking time and improved sleep quality versus placebo.^[2]

Typical research doses range from 250-500 mg per day. Look for products that disclose their certificate of analysis.

Urolithin A

Urolithin A is what your gut produces when it breaks down compounds found in pomegranate, walnuts and certain berries. The catch is that many people’s gut bacteria don’t make enough of it on their own, which is why direct supplementation has become a research focus. Its main job is helping your cells clear out worn-out parts so they can keep working efficiently.

The pivotal ATLAS trial published in Cell Reports Medicine showed that urolithin A at 500-1,000 mg per day improved muscle strength by roughly 12% and aerobic endurance in middle-aged adults compared with placebo.^[3] A 2025 randomized trial in Nature Aging extended this finding by showing that 1,000 mg per day for four weeks reduced markers of immune aging and inflammation in healthy middle-aged adults.^[4]

This is one of the most exciting compounds in longevity right now because the human data has caught up with the mechanistic promise.

PQQ (Pyrroloquinoline Quinone)

PQQ is an antioxidant compound best known for encouraging your cells to grow new mitochondria — the tiny energy-generating structures that power nearly everything your body does. Since cellular energy output is one of the first things to slip with age, that makes PQQ mechanistically interesting for longevity.

Research evidence on PQQ comes primarily from smaller human trials and preclinical work, with consistent signals across the body of literature.^[5] Reported effects include improvements in cognitive performance, sleep quality and cardiovascular markers, with mitochondrial biogenesis and antioxidant defense as the underlying mechanisms. Typical research doses sit around 10-20 mg per day.

Omega-3 Fatty Acids (EPA and DHA)

If we had to pick a single supplement with the strongest aging-clock evidence, omega-3 would be it. A 2025 analysis of the DO-HEALTH trial randomized 777 Swiss older adults to vitamin D, omega-3, a home exercise program or combinations. It found that 1 g per day of omega-3 alone slowed three DNA methylation clocks of biological aging (PhenoAge, GrimAge2 and DunedinPACE) by 2.9–3.8 months over three years.^[6] The combination of all three interventions reduced incident invasive cancer by 61% and prefrailty by 39%.

EPA and DHA also support a healthy inflammatory response, cardiovascular function and brain health. We aim for 1-2 g of combined EPA + DHA per day from a third-party tested fish oil or algae oil.

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Collagen Peptides

Collagen is the most abundant protein in your body and the structural scaffolding behind skin elasticity, joint cushioning and gut lining integrity. Collagen synthesis slows in your late 20s and accelerates downward through midlife.

A 2025 systematic review and meta-analysis of 23 randomized controlled trials covering 1,474 participants found that oral collagen peptide supplementation significantly improved skin hydration, elasticity and wrinkle measurements.^[7] Daily dosing was consistently more effective than every-other-day dosing. Most studies used 5-15 g per day of hydrolyzed collagen peptides.

This is where sourcing matters. Our Unflavored Collagen Peptides are grass-fed and pasture-raised, easy to add to coffee or smoothies and third-party tested for purity. You can read more about how it works in our collagen protein primer.

Vitamins A, D and K

These three fat-soluble vitamins work together. Vitamin D3 governs calcium absorption and immune signaling. Vitamin K2 (especially the MK-7 form) directs that calcium into bone instead of arteries. Vitamin A supports vision, skin and immune function. A meta-analysis published in 2024 found that vitamin K supplementation increased lumbar spine bone mineral density and decreased uncarboxylated osteocalcin, a marker of vitamin K insufficiency, in middle-aged and older adults.^[8]

The DO-HEALTH trial discussed above also showed that vitamin D added to the additive benefit of omega-3 on biological aging clocks.^[9] For most people, getting all three from a quality supplement is a foundational longevity move — whether as individual capsules or a combined formula.

Balance matters for longevity minerals too. Zinc and copper work as a pair to form copper-zinc superoxide dismutase, one of the body’s most important antioxidant enzymes, and to support collagen production and DNA repair.^[10] The catch is that many people get plenty of zinc but fall short on copper, and long-term zinc supplementation without copper can quietly drive a copper deficiency. If you stack zinc, pair it with copper or choose a formula that already balances the two.

Creatine Monohydrate

Creatine is no longer just a gym supplement. A 2025 systematic review and meta-analysis of 22 studies covering 721 older adults found that creatine combined with resistance training increased lean tissue mass by about 1.37 kg and improved muscle strength meaningfully more than training alone.^[11] The mechanism is simple: creatine helps your muscles and brain top up their energy reserves faster between efforts.

Sarcopenia, the age-related loss of muscle, is one of the strongest predictors of frailty and mortality risk in older adults. Creatine plus strength training is one of the most reliable interventions we know of. Look for plain creatine monohydrate at 3-5 g per day.

Curcumin (With Piperine)

Curcumin is the active compound in turmeric, the one behind the research on soothing effects and antioxidant support for aging cells. The catch is absorption: standalone curcumin breaks down before it can act, but pairing it with piperine (the active compound in black pepper) increases absorption by roughly 2,000%. A GRADE-assessed meta-analysis of randomized controlled trials found that curcumin significantly reduced CRP, TNF-alpha and IL-6: three of the main inflammatory signaling molecules tied to chronic disease and aging.^[12]

Look for a curcumin product that specifies piperine or another absorption-enhancing technology. Typical doses are 500-1,000 mg per day.

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Promising but Mixed: Resveratrol and Fisetin

We would be doing you a disservice if we did not name the two compounds that dominate longevity headlines but have shakier human evidence so far.

Resveratrol is the polyphenol from red wine and Japanese knotweed that put sirtuin activation on the map. The mechanism is real. A 2024 systematic review in the International Journal of Molecular Sciences concluded that despite hundreds of studies, “there is currently no conclusive clinical evidence to advocate its recommendation in any healthcare setting.”^[13] The bottleneck is bioavailability. Most oral resveratrol never reaches meaningful blood concentrations. It is an interesting compound to watch as delivery technology improves, but it is not where we would invest first.

Fisetin is a senolytic flavonoid that may help clear senescent cells: the old, dysfunctional cells that drive inflammation and aging. Preclinical results in mice are striking. The 2024 TROFFi Phase II trial in older breast cancer survivors is currently testing 20 mg/kg fisetin on physical function, and a separate Mayo Clinic 2024 series in long-COVID patients reported symptom improvement in 64% of fisetin-treated participants.^[14] The biology is compelling. The randomized human data is still emerging.

We will update this list as the trials read out.

Our Take on Healthspan

At Bulletproof we have always thought about performance as a long game. The goal is to feel sharp, strong and energetic, not just at 30, but at 50, 60 and beyond. That is healthspan. The supplement category sells novelty. We sell consistency.

We think about longevity in three layers, foundation first.

Foundation: cellular fuel and structural raw materials. Most people are missing the basics before they need anything exotic. We start with two core staples:

• Brain Octane C8 MCT oil: pure C8 (caprylic acid) converts to ketones faster than other MCT types, giving your mitochondria a clean fuel source that supports cellular energy and a steady mental state. Learn more in our MCT oil benefits guide.
• Unflavored Collagen Peptides: grass-fed and pasture-raised, the daily 20 g scoop your skin, joints, hair and gut lining have been asking for.

For fat-soluble vitamin coverage (vitamins A, D and K), look for a quality combined supplement that covers all three. Getting this foundation in place before adding anything exotic is where most people see the biggest return.

Targeted: pick one or two based on goal. This is where NAD+ precursors, urolithin A or GlyNAC fit. If you are over 50, NMN or NR is a reasonable next layer. If you train and want better recovery, urolithin A and creatine are top picks. If your inflammatory markers run high, curcumin with piperine.

Optional: stack on demand. Resveratrol or fisetin if you are curious and have the budget. Just calibrate expectations to the evidence.

Every product we make is rigorously tested for purity and efficacy and third-party verified. We do not chase trends. We chase the daily routine that compounds over decades.

How to Build a Daily Longevity Stack

A practical daily longevity stack you can actually follow looks like this. Start with the foundation, then add one targeted layer at a time so you can feel how each one affects you.

Morning (with food and your coffee):

• 1-2 g combined EPA + DHA omega-3
• Vitamin D3 (1,000-2,000 IU) with K2
• 1 scoop Bulletproof Unflavored Collagen Peptides (20 g) in coffee
• 1-2 tablespoons Brain Octane C8 MCT oil

Targeted layer (pick based on goal):

• NMN 250-500 mg or NR 300-600 mg for cellular energy and NAD+ support
• Urolithin A 500-1,000 mg for mitochondrial quality and recovery
• GlyNAC (1.5-3 g glycine + 600-1,200 mg NAC) for glutathione restoration

Optional add-ons:

• Creatine monohydrate 3-5 g per day, anytime
• Curcumin 500-1,000 mg with piperine, with meals

If this list still feels long, start with the foundation and our Bulletproof Starter Kit. You can browse the full supplements collection once you have your baseline routine dialed in, and check out the Brain Health Collection for cognitive-longevity layers like nootropics.

A few non-negotiables. Third-party testing matters more than the marketing label. Diet, sleep, training and stress management still outrank any supplement. Supplements support a lifestyle. They do not replace one. And consistency beats intensity. A modest stack you take every day will outperform an aggressive one you start and stop.

Two adjacent levers also worth knowing. An anti-inflammatory eating pattern reduces the inflammatory load your supplements are trying to counter. And intermittent fasting is one of the most reliable ways to trigger autophagy without any pill at all.

Other Longevity Compounds Worth Knowing About

A handful of other compounds keep showing up in the longevity literature with early but interesting research. We are not putting them in the foundation tier yet, but they are worth tracking if you are building an advanced stack.

ALCAR (acetyl-L-carnitine). ALCAR helps your cells convert fat into usable energy and can cross into the brain, where it has been studied for cognitive support in older adults. A handful of human trials in adults with mild cognitive impairment or age-related fatigue report improvements in memory, mental energy and processing speed, though the evidence base is older and the effect sizes are modest.^[15] It is one to consider if cognitive aging is your primary concern, not your first foundational pick.

Oxaloacetate (OAA). Oxaloacetate is a Krebs cycle intermediate that has drawn attention as a possible caloric restriction mimetic, meaning it may switch on some of the same longevity pathways that fasting and caloric restriction activate. Animal studies show OAA helps protect against glutamate-driven brain stress and supports mitochondrial energy production.^[16] Human data is still thin, so this one sits firmly in the “watch the trials” category.

Whey protein. Whey is one of the most efficient food-based ways to support glutathione — your body’s main built-in antioxidant, the molecule that helps neutralize day-to-day cellular damage. Whey provides the raw materials your liver needs to make more of it, and human studies show it can raise glutathione levels meaningfully.^[17] Sourcing is the catch: heat denatures the proteins that carry cysteine in its usable form, so look for cold-processed, undenatured, grass-fed whey protein and avoid blending it into anything hot.

D-Ribose. D-Ribose is a type of sugar your cells use specifically to build cellular energy — and unlike regular sugar, it goes directly into that process rather than being stored as fat. Most research is around recovery from physical or cardiac stress rather than mainstream longevity, so it sits on the edge of the longevity conversation rather than at the center. Worth knowing about if energy production is your specific concern.

Polyphenols (from food, not just supplements). Polyphenols are plant compounds with broad antioxidant activity that help protect cells from oxidative stress and support brain and cardiovascular health over time. The best longevity move here is dietary: red cabbage, dark berries, dark cacao, coffee and extra virgin olive oil all deliver them in bioavailable form. Supplement isolates exist, but eating polyphenol-rich foods consistently is the simpler, better-evidenced path.

Apigenin. Apigenin is a flavonoid found in celery, parsley and chamomile that has been studied for its support of mitochondrial NAD+ levels, sleep quality and cellular antioxidant defenses. Most evidence is preclinical, with growing interest in its role in healthy cellular aging. A low-effort food source: fresh parsley, celery and chamomile tea.

The Bottom Line

Longevity is not one breakthrough pill. It is a foundation of clean fuel, structural raw materials and key vitamins, layered with one or two targeted compounds whose human evidence has matured. Skip the noisy lists of 15 supplements. Start with three or four that earn their place every day, get rigorously tested products from a brand you trust and let the routine compound over years.

Ready to start? Build your foundation with the Bulletproof Starter Kit and add a single targeted layer once that habit sticks. Results may vary, and your daily routine is what does the heavy lifting.

Frequently Asked Questions

Which longevity supplements actually have research behind them?

NAD+ precursors (NMN and NR), urolithin A, omega-3 fatty acids, vitamin D3, collagen peptides, creatine and glutathione precursors (GlyNAC) have the strongest 2021+ human clinical evidence. Curcumin, CoQ10 and vitamin K2 also have solid randomized trial data. Resveratrol and spermidine have promising mechanistic data with mixed clinical results, and fisetin trials are still emerging.

How does NAD+ supplementation support longevity at the cellular level?

NAD+ is a molecule your body uses to keep cells running and to help them repair the wear and tear they accumulate every day. Levels naturally decline as you get older. NMN and NR are precursors (your body converts them into NAD+), and human trials have shown they can raise NAD+ levels and improve muscle function, walking speed and sleep quality in older adults at doses of 250-500 mg per day.

How does Bulletproof support healthspan and longevity?

At Bulletproof we focus on a daily, foundational stack: Brain Octane C8 MCT oil for cellular ketone signaling and grass-fed Collagen Peptides for skin, joints and gut lining. The principle is consistency over complexity. Get the foundation right every day, then layer in targeted compounds like NAD+ precursors or urolithin A as the science supports them.

Which antioxidant supplements slow aging most effectively?

Glutathione precursors (GlyNAC), curcumin paired with piperine for absorption, CoQ10 and the fat-soluble vitamins A, D and K have the strongest evidence for protecting cells from oxidative damage. Omega-3 fatty acids have been shown to slow biological aging clocks in randomized trials. The most effective approach pairs targeted antioxidants with foundational nutrients rather than relying on any single compound.

What longevity supplements should I actually be taking daily?

A simple daily foundation looks like this: vitamin D3 with K2, omega-3 (EPA and DHA), and collagen peptides for connective tissue. Layer in C8 MCT oil for cellular energy, creatine monohydrate for muscle and brain, and curcumin with piperine for antioxidant support. Targeted additions like NMN, urolithin A or GlyNAC can be stacked based on goals and budget. Always choose third-party tested supplements.

This article was originally published on December 7, 2020 and has been updated with new content.