Harvard Health Publishing’s Pathways to Longevity report highlights five supplements — multivitamins, omega-3 fatty acids, creatine, collagen, and curcumin — as potential supporting tools for healthy aging. Published in mid-2026, it draws on existing research and expert consensus to offer practical guidance. This article breaks down what the report actually says about each supplement, what the underlying science suggests, and who should exercise caution.
Pathways to Longevity is a practitioner and consumer guidance document, not a clinical trial. The report draws on a body of existing research and expert consensus. Listing a supplement in the report does not mean Harvard has proven it extends human lifespan; it means the evidence base was considered strong enough to merit inclusion as a potential area of interest. That distinction matters, and the hedged language used throughout the report itself reflects that nuance.
Below is a plain-language breakdown of each supplement the report highlights, what the science behind it suggests, and who should exercise caution.
What the Report Actually Covers
The Pathways to Longevity report positions supplements as one component of a multi-factor approach to healthy aging. Its emphasis is on foundations first: sleep, movement, stress management, and diet, with supplements framed as potential supporting tools rather than standalone solutions. This sits in line with the broader scientific consensus, which generally holds that no supplement replaces lifestyle fundamentals.
Five specific supplements appear repeatedly in coverage of the report and are worth examining individually.
The Five Supplements the Report Highlights
Multivitamins
The report includes multivitamins primarily as a nutritional insurance measure: dietary gaps are common even in populations eating relatively well, and a broad-spectrum multivitamin may help fill those gaps. Some research associates consistent multivitamin use with reduced risk of nutritional deficiency-related decline, though the evidence for longevity-specific benefits remains mixed. A large-scale 2023 study from the COSMOS trial suggested that daily multivitamin use may be associated with modestly slower cognitive aging in older adults, and this type of evidence appears to inform the report’s inclusion of them.
The report’s framing is cautious: multivitamins are positioned as complementary, not transformative.
Cautions: High-dose multivitamins may interact with certain medications, including blood thinners (some B vitamins can affect clotting) and thyroid medications (calcium and iron can interfere with absorption). Fat-soluble vitamins (A, D, E, and K) accumulate in the body and may reach harmful levels if both a multivitamin and separate supplements are taken simultaneously. Individuals with kidney disease should consult a healthcare professional before use, as some formulations contain minerals that require healthy renal clearance. Not all multivitamin products are third-party tested for potency or purity; look for USP, NSF, or ConsumerLab verification marks.
Omega-3 Fatty Acids
Omega-3 fatty acids, principally EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) from marine sources, are among the most studied supplements in the longevity and cardiovascular space. The report highlights their association with markers of cardiovascular health, reduced systemic inflammation, and cognitive support. Some research suggests omega-3 intake is associated with longer telomere length, considered a marker of cellular aging, though the clinical significance of this finding is still being studied.
The COSMOS-Mind and VITAL trials have provided meaningful data in recent years, suggesting that omega-3 supplementation may support cognitive function in older adults and reduce cardiovascular events in certain populations, particularly those with low baseline fish intake.
Cautions: Omega-3 supplements have blood-thinning properties and may interact with anticoagulant medications such as warfarin and apixaban; individuals on these medications should consult a healthcare professional before starting supplementation. High doses (typically above 3 g/day) may increase bleeding risk. Some omega-3 products have been found to contain oxidized oil, which may be counterproductive; look for products with IFOS certification or similar third-party quality verification. Those with fish or shellfish allergies should confirm the source of their omega-3 product; algae-based DHA/EPA is an alternative.
Creatine
Creatine is a compound the body produces naturally and obtains from dietary meat and fish. It is most well-known in the fitness community for supporting muscular power output, but the report’s inclusion of it reflects growing research interest in creatine’s role in muscle mass preservation and cognitive function as we age. Sarcopenia, the progressive loss of muscle mass and strength with age, is a significant driver of functional decline and mortality risk in older adults, and some research suggests creatine supplementation combined with resistance training may be associated with improved muscle retention.
Emerging research also explores creatine’s potential role in brain energy metabolism, with some studies suggesting it may support cognitive performance under stress or sleep deprivation, though this remains an active and evolving area of research.
Cautions: Creatine is generally considered well-tolerated at standard doses (3–5 g/day of creatine monohydrate), but individuals with pre-existing kidney disease or a single kidney should consult a healthcare professional before use, as the kidneys are responsible for clearing creatine metabolites. Some people experience gastrointestinal discomfort during a loading phase; a maintenance-only approach (skipping the loading phase) is often recommended to minimise this. Creatine may interact with nephrotoxic drugs; if you take any medications with kidney-related cautions, speak with your doctor first. Women who are pregnant or nursing should consult a healthcare professional before use, as research in these populations is limited. For a deeper look at creatine’s evidence base for women specifically, see our creatine for women guide.
Collagen
Collagen is the most abundant structural protein in the human body, found in skin, cartilage, tendons, and bones. Collagen production declines with age, and this decline is associated with changes in skin elasticity, joint comfort, and bone density. The report’s inclusion of collagen reflects an emerging evidence base suggesting that hydrolysed collagen peptide supplementation may support skin hydration and elasticity, and may be associated with improvements in joint comfort in some populations.
The evidence for collagen supplements is younger and thinner than for omega-3 or creatine. Most positive studies are small and some are industry-funded, which warrants caution when interpreting results. The report includes it as an area of emerging interest rather than a firmly established recommendation.
Cautions: Collagen supplements are derived primarily from bovine, marine, or porcine sources. Individuals with allergies to fish or shellfish (for marine collagen), or those following vegetarian or vegan diets, should verify the source. Some collagen products contain added vitamin C (which may support collagen synthesis); individuals taking blood thinners should be aware that high-dose vitamin C can affect anticoagulant activity. Those with a history of kidney stones should be cautious with high doses of any protein supplement. Collagen supplements are not regulated as drugs; third-party testing certification is advisable. For those interested in how skincare and supplement approaches interact, our anti-aging skincare science guide covers the skin health angle.
Curcumin
Curcumin is the primary active compound in turmeric and has attracted substantial research interest for its proposed anti-inflammatory and antioxidant properties. Chronic low-grade inflammation is widely considered a driver of age-related disease, and some research suggests curcumin may modulate inflammatory markers such as NF-κB and certain interleukins. The report highlights curcumin as a dietary compound associated with markers of reduced inflammation, though it notes that curcumin’s bioavailability in standard forms is poor.
This bioavailability challenge is practically significant: plain curcumin powder is poorly absorbed from the gut. Formulations that pair curcumin with piperine (black pepper extract), use phospholipid complexes (phytosome), or employ nano-encapsulation technology are associated with meaningfully higher absorption in research studies. The supplement form matters considerably here. For a broader look at polyphenol compounds and longevity research, see our polyphenol supplements guide.
Cautions: Curcumin has blood-thinning properties and may interact with anticoagulant and antiplatelet medications (warfarin, aspirin, clopidogrel); individuals on these medications should consult a healthcare professional before use. Curcumin may also interact with blood sugar-lowering medications, potentially enhancing their effect; diabetic patients should monitor accordingly. High-dose curcumin supplementation is generally not recommended in the two weeks before surgery due to bleeding risk. Some individuals experience gastrointestinal upset, particularly at higher doses. Those with gallbladder issues (such as gallstones or bile duct obstruction) should exercise caution, as curcumin stimulates bile production. Pregnant and nursing individuals should consult a healthcare professional before supplementing, as evidence in these populations is limited.
How to Think About This Report: What It Is and Isn’t
When a source like Harvard Health Publishing includes a supplement in a longevity framework, it carries real signal, but it is worth understanding what that signal means. The report synthesises existing research and expert perspective into practical guidance. It does not conduct new research. Inclusion in the report means the evidence base was considered credible enough to merit discussion; it does not mean the supplement has been proven to extend human lifespan in clinical trials.
This matters because the supplement industry is prone to overstating what reports like this say. You may see products advertised as “Harvard-recommended” on the basis of such coverage. That framing is almost always misleading. Harvard Health Publishing is not endorsing specific products, and the report is describing research contexts, not granting certifications.
The bigger picture: supplements as one layer
The report’s own structure is worth keeping in mind. Pathways to Longevity addresses lifestyle factors (sleep quality, physical activity, dietary patterns, stress, and social connection) before addressing supplementation. The evidence base for these foundational factors is substantially stronger and more consistent than for any individual supplement. Supplements appear in the report as potential additions to an already solid foundation, not as shortcuts around one.
Quality and third-party testing
Supplements are not regulated with the same rigour as pharmaceuticals in the US, UK, Canada, or Australia. This means the compound in the capsule may not match the label in dose or purity without independent verification. Third-party testing certifications (USP, NSF International, Informed Sport, IFOS for fish oil, or ConsumerLab) provide meaningful assurance that what’s on the label is in the bottle. When evaluating supplements from this report’s list, look for one of these marks.
Common Misconceptions About Longevity Supplements
- “More is better.” Fat-soluble vitamins and some minerals accumulate. Higher doses do not linearly increase benefit and can introduce risk. Follow clinically studied doses, not marketing-driven “mega-dose” formulations.
- “Natural means safe.” Curcumin, fish oil, and creatine are all “natural” and all carry clinically meaningful drug interactions. Natural origin does not equal risk-free, particularly for individuals on multiple medications.
- “These will reverse aging.” No supplement currently has clinical evidence to reverse biological aging in humans. Associations with slower decline or improved markers of aging are not the same as reversal. The report does not claim otherwise.
- “If Harvard mentions it, it’s settled science.” The report reflects the current state of evidence, which for some of these supplements (particularly collagen) is still developing. The report appropriately hedges, and your expectations should too.
- “I don’t need to tell my doctor.” Several of these supplements interact with commonly prescribed medications. Any new supplement regimen is worth a conversation with a healthcare professional, particularly for individuals over 60 or those managing chronic conditions.
Who This Report Is (and Isn’t) Relevant For
The supplement recommendations in Pathways to Longevity are most relevant to healthy adults over 40 who are already addressing lifestyle fundamentals and are looking for evidence-informed additions to their routine. They are less directly relevant to:
- Young adults (under 30) whose nutritional needs and longevity risks differ from the aging populations most of the referenced research was conducted on.
- Individuals with complex medication regimens: the interaction risks noted above make individual medical guidance essential before starting any of these supplements.
- Those with significant underlying health conditions (kidney disease, liver disease, autoimmune conditions, active cancer treatment): several of these supplements are not well-studied in these populations and may carry additional risks.
- Pregnant or nursing individuals: the evidence base for most of these supplements in pregnancy is limited or absent. Consult a healthcare professional before use.
Tools and Resources That May Help
If the Pathways to Longevity report has you thinking about your supplement approach more systematically, there are a few areas where we’ve done deeper dives that may be useful as next steps.
If you want to go deeper on the longevity supplement landscape, including newer compounds like NMN, NAD+, and AKG that appear in parallel longevity research, our longevity supplements comparison covers the evidence and tradeoffs across those categories, including the rapidly evolving NAD+ precursor research.
Supplement timing is also worth attention: most of the compounds discussed here have meaningful absorption considerations, and our supplement timing guide covers common errors that reduce the effectiveness of otherwise well-chosen supplements.
Frequently Asked Questions
Does the Harvard report prove these supplements extend lifespan?
No. Pathways to Longevity is a guidance document that synthesises existing research; it does not conduct new clinical trials. The report suggests these supplements are supported by enough evidence to warrant consideration; it does not claim any supplement has been proven to extend human lifespan. The distinction between association and causation is important here.
Should I take all five supplements the report highlights?
Not necessarily, and not without consulting a healthcare professional first. These five supplements have different evidence bases, different mechanisms, and different interaction profiles. Some may be more relevant to your individual health context than others. A personalised conversation with a doctor or registered dietitian is the most evidence-aligned approach to deciding what, if anything, to add to your routine.
Which of these supplements has the strongest evidence?
Omega-3 fatty acids and creatine monohydrate have the longest and most robust research track records of the five. Both have been studied in large-scale trials across multiple populations. Multivitamins have reasonable evidence for nutritional gap-filling. Curcumin has promising mechanistic research but bioavailability challenges. Collagen has the most nascent evidence base, with most positive studies being small and relatively recent.
How do I find a quality supplement product?
Look for third-party testing certification on the label: USP, NSF International, Informed Sport, IFOS (specifically for fish oil), or ConsumerLab verification. These certifications mean an independent body has confirmed the product contains what the label states at the doses listed, and that it meets purity standards. Price alone is not a reliable quality indicator in either direction.
Are there interactions between these supplements themselves?
Some. Both omega-3 and curcumin have blood-thinning properties, and taking both simultaneously at high doses may compound this effect, particularly if you are also taking anticoagulant medication. Fat-soluble vitamins in a multivitamin and additional standalone supplements can lead to accumulation. If you are taking multiple supplements from this list, reviewing the combination with a healthcare professional or pharmacist is advisable.
Is this report relevant outside the United States?
The research the report draws on is largely international and the findings are broadly applicable to adults in the UK, Canada, and Australia. However, supplement regulation, product availability, and labelling standards differ across these markets. UK readers should note MHRA guidelines; Canadian readers should look for Health Canada natural product numbers (NPNs); Australian readers should look for ARTG (Australian Register of Therapeutic Goods) listings as a quality signal.
Bottom Line
The Pathways to Longevity report from Harvard Health Publishing is a credible synthesis of where the mainstream longevity supplement conversation currently sits. Its inclusion of multivitamins, omega-3 fatty acids, creatine, collagen, and curcumin reflects a genuine and growing evidence base — but the report itself is appropriately measured in what it claims. These supplements are associated with markers of healthy aging in various research contexts; none of them are proven lifespan extenders, and the report does not say they are.
The most evidence-aligned approach to longevity supplementation starts with lifestyle fundamentals, adds supplements where there is a genuine individual need or rationale, prioritises quality and third-party testing, and involves a healthcare professional, especially for anyone on medication or managing a health condition. Used thoughtfully, the supplements highlighted in this report may support healthy aging as part of a broader strategy. Used as shortcuts, or at the expense of the foundations, they are unlikely to deliver meaningful benefit.