Longevity supplements: 5 ingredients for longevity according to the latest science 2026

Supplements for longevity are sold based on studies, most of which were conducted on yeast, nematodes, and mice. No over-the-counter preparation has evidence of extending human life, and some of the most prominent results have not been replicated in independent studies. This does not mean these ingredients are worthless. Several of them improve measurable health parameters, but at a completely different level than the label promises. We have reviewed the five most commonly sold longevity ingredients: NMN and NR, resveratrol, curcumin, omega-3 fatty acids, and vitamin D3 with K2. For each, we provide what has been specifically shown in humans, what has not been shown, what doses were used in studies, and which medications the preparation should not be combined with in one pharmacy.

KEY INFORMATION
• A meta-analysis of ten large studies involving 77,917 individuals did not show a reduction in the risk of vascular events after omega-3 supplementation (Aung et al., JAMA Cardiology 2018).
• NMN raises NAD+ levels, but in older adults, it did not improve grip strength or walking speed.
• Resveratrol has not proven to be a direct activator of the SIRT1 sirtuin.
• Vitamin D deficiency affects 89.9% of tested adult Poles, and this is the best-documented problem among this group.

What are longevity supplements and how to assess the strength of their evidence?

These are preparations targeting the biological mechanisms of aging described as hallmarks of aging: genomic instability, telomere shortening, mitochondrial dysfunction, cellular senescence, and several others (López-Otín et al., Cell 2013, a list expanded to twelve items in 2023). Targeting a mechanism is, however, different from proving an effect on human health.

The difference becomes apparent only when you check who was studied, for how long, and what was measured. Longevity marketing usually omits all three pieces of information.

The entire five described below fit into the two middle rows or, in the case of vitamin D and omega-3, reach the last row with a significantly more modest result than the advertisement suggests. We noticed while organizing this category that the more expensive the product, the more often the product description refers to studies on rodents.

Do NMN and NR slow down aging in humans?

There is no evidence for that. NMN and NR consistently raise NAD+ levels in the blood, but a systematic review of randomized studies in older adults did not show an improvement in muscle mass index, handgrip strength, or walking speed (Prokopidis i in., Journal of Cachexia, Sarcopenia and Muscle 2025).

The starting point for the entire category is the observation that NAD+ concentration in human tissues decreases with age, which has been documented in skin samples taken from donors aged 0 to over 70 years (Massudi i in., PLoS ONE 2012). NAD+ is needed for mitochondria, DNA repair, and sirtuins, so replenishing it makes biological sense.

What studies on humans have shown. Yoshino i in. (Science, 2021) they administered 250 mg of NMN daily for 10 weeks to 25 postmenopausal women with prediabetes and observed an improvement in muscle insulin sensitivity. Yi i in. (GeroScience, 2023) they administered 300, 600, or 900 mg to 80 healthy middle-aged individuals for 60 days and noted a dose-dependent increase in NAD+ and a longer distance in the six-minute walk test. Aerobic capacity improved in 48 amateur runners training 5-6 times a week, although maximum oxygen uptake did not change in any group (Liao i in., 2021). Igarashi i in. (npj Aging, 2022) they observed an improvement in walking speed at the borderline of significance in older men and cautioned that it requires confirmation in larger trials.

The longest of these trials lasted twelve weeks, so nothing is known about the safety of long-term use. None measured a hard endpoint. Details in a separate text about NMN po czterdziestce.

Does resveratrol really extend life?

There is no data on this in humans, and the foundation of this hypothesis has proven to be weaker than previously thought. Resveratrol extended the lifespan of yeast (Howitz i in., Nature 2003) and improved the survival of mice fed a high-calorie diet (Baur i in., Nature, 2006). It later turned out that SIRT1 activation was an artifact of the method.

The Pfizer team repeated the original test and showed that neither resveratrol nor synthetic activators stimulate SIRT1 directly: the effect only appeared when the peptide used in the test was labeled with a fluorescent dye (Pacholec i in., Journal of Biological Chemistry 2010). The mechanism on which the entire narrative about the "red wine molecule" was built did not pass replication.

In humans, results vary depending on who is being studied. Timmers i in. (Cell Metabolism, 2011) they administered 150 mg daily for 30 days to obese men and observed an improvement in metabolic profile. A year later Yoshino i in. (Cell Metabolism, 2012) they administered 75 mg for 12 weeks to lean postmenopausal women with normal glycemia and found no improvement. In 27 inactive men around sixty-five years old, 250 mg daily for eight weeks actually weakened the benefits of high-intensity training (Gliemann i in., Journal of Physiology, 2013). Metaanaliza Hausenblas i in. (Molecular Nutrition and Food Research, 2015) showed glycemic effects only in pharmacologically treated type 2 diabetes patients.

Additionally, there is poor bioavailability: first-pass metabolism takes away most of the dose before it reaches the tissues. Note that the doses in these three trials ranged from 75 to 250 mg and did not establish any relationship based on the size of the dose, only on who was studied. More in the text about resweratrolu i spowalnianiu starzenia.

What does curcumin do with inflammation and how to improve its absorption?

It lowers markers of chronic inflammation, and this is its best-documented effect. A meta-analysis of eight randomized studies showed a decrease in TNF-alpha concentration by 4.69 pg/ml (Sahebkar i in., Pharmacological Research 2016), and a separate meta-analysis of ten therapeutic arms showed a decrease in interleukin 6 by 0.60 pg/ml (Derosa i in., Pharmacological Research, 2016).

It is worth noting that these are markers, not endpoints. Lower TNF-alpha does not automatically mean a lower risk of heart attack or dementia. The most interesting functional data comes from an eighteen-month randomized study involving 40 individuals without dementia: a bioavailable form of curcumin improved verbal memory and attention compared to placebo, and in a PET study, it reduced amyloid and tau signals in the amygdala (Small i in., American Journal of Geriatric Psychiatry, 2018). This is a single, small trial, in which imaging included only fifteen individuals from each group.

The problem remains absorption: curcumin itself is absorbed poorly and quickly undergoes conjugation in the intestine and liver. A classic study on volunteers showed that after administering 2 g of curcumin, its serum concentration was barely detectable, and the addition of 20 mg of piperine increased bioavailability by 2000% (Shoba i in., Planta Medica, 1998). Phospholipid and liposomal forms address this same problem differently: in Small's study, a preparation containing 90 mg of curcumin was administered twice daily. More in the text about curcumin and curcumin absorption.

How strong is the evidence for omega-3 EPA and DHA?

Significantly weaker than the packaging suggests. A meta-analysis of ten large randomized studies involving 77,917 participants showed no reduction in the risk of coronary death, non-fatal heart attack, or serious vascular events after omega-3 supplements (Aung i in., JAMA Cardiology 2018, risk ratio 0.97).

This was confirmed by the largest primary prevention study. In the VITAL trial, 25,871 people took 1 g of omega-3 fatty acids daily for a median of 5.3 years, and the difference in cardiovascular events and cancer incidence did not reach statistical significance (Manson i in., New England Journal of Medicine 2019).

So where does the loud 25% risk reduction come from? From the REDUCE-IT study, in which 8179 patients with hypertriglyceridemia received 4 g of ethyl ester of eicosapentaenoic acid, a prescription drug with pure EPA, not fish oil from the pharmacy (Bhatt i in., New England Journal of Medicine, 2019). When in the STRENGTH study, 13,078 patients were given 4 g of a mixture of EPA and DHA, the trial was stopped early due to a low likelihood of benefit (Nicholls i in., JAMA, 2020). The cognitive benefit was also not confirmed: fish and omega-3 intake was not associated with dementia risk over 9.6 years of observation (Devore i in., American Journal of Clinical Nutrition, 2009).

What remains from the hard findings: lowering triglycerides and supplementing a diet low in fish. The difference between these trials lies not in the dose size but in the composition of the preparation: 1 g of the mixture in VITAL and 4 g of the mixture in STRENGTH did not work, while 4 g of pure ethyl ester EPA in REDUCE-IT did. Fish oil from the pharmacy shelf is a mixture, not pure EPA.

Why combine vitamin D3 with vitamin K2 MK-7?

The reason is mechanistic, not evidential, and these two things must be distinguished. Vitamin D supplementation in Poland is justified by correcting deficiency, not preventing heart disease: in the VITAL study, 2000 IU of D3 daily for 5.3 years did not reduce the risk of heart attack, stroke, or cardiovascular death (Manson i in., NEJM 2019).

The scale of deficiency is well measured. In a cross-sectional study of 5,775 adult residents of 22 Polish cities, conducted at the end of winter and in spring, the average concentration of 25(OH)D was 18.0 ng/ml. Below 20 ng/ml was found in 65.8% of the participants, while only 9.1% were in the optimal range of 30-50 ng/ml (Płudowski et al., Polish Archives of Internal Medicine 2016). In the randomized arm of Chowdhury's review, which included 22 trials and 30,716 participants, cholecalciferol was associated with lower overall mortality, but the upper end of the confidence interval approached unity: a relative risk of 0.89 with a range of 0.80-0.99. Ergocalciferol showed no effect (Chowdhury i in., BMJ, 2014).

The role of vitamin K2 is based on the MGP protein, which inhibits calcium deposition in the arterial wall and requires vitamin K-dependent carboxylation (Maresz, Integrative Medicine, 2015). Support for this hypothesis is observational: in the Rotterdam study, the highest tertile of menaquinone intake was associated with a 57% lower risk of coronary death and a 52% lower risk of severe aortic calcification (Geleijnse i in., Journal of Nutrition 2004). It’s a diet, not capsules, and a relationship, not causality. The two forms of menaquinone differ radically: after a single dose of 420 µg MK-7, it was detectable in serum for up to 48 hours, while MK-4 at the same dose did not appear at any measurement point (Sato i in., Nutrition Journal, 2012). There are no national dosage recommendations for vitamin K2, so the numbers on labels are based on individual trials. The expansion in the text about combining D3 with K2.

What medications do these supplements interact with?

The most problematic is resveratrol. In a study on healthy volunteers, 1 g daily for 4 weeks inhibited the activity of CYP3A4, CYP2D6, and CYP2C9 and induced CYP1A2 (Chow i in., Cancer Prevention Research 2010). These enzymes metabolize a significant portion of prescription medications, from statins to antiarrhythmics.

The following summary organizes situations where the supplement requires a conversation with a doctor before purchase, not after the first package.

From our experience with product descriptions in this category, information about interactions appears on the label less frequently than any other data. This is precisely the item whose absence should be a red flag.

How to structure a protocol and how to recognize misleading advertising?

The order of expenses is the reverse of the marketing order. First, address what is truly lacking in the Polish population, namely vitamin D, confirmed by a blood test. Then supply omega-3 fatty acids, preferably from fatty fish twice a week. NMN and resveratrol are at the end of this list, not at the beginning.

Red flags in advertising are recurring. The promise of "reversing aging" without citing human studies. Presenting results from mice as recommendations for humans. A number like "reduces biological age by 8 years" without specifying how this age was measured. A dose many times higher than in studies, without justification. Lack of information on drug interactions. The phrase "activates sirtuins" presented as a fact, even though this mechanism has not been replicated. A reputable manufacturer will provide the dose of the active ingredient, not just the extract, the specific chemical form, and a purity certificate for the batch.

How much of longevity depends on supplements, and how much on lifestyle?

The ratio is unfavorable for capsules. The PREDIMED study, in which 7447 individuals at high cardiovascular risk were randomly assigned to a Mediterranean diet with extra virgin olive oil or nuts, showed about a 30% lower risk of cardiovascular events compared to the control group (Estruch i in., NEJM 2018, wersja po ponownej analizie i republikacji).

This is a result from hard endpoints that no supplement from this group has achieved. Physical activity, sleep, and not smoking have similar effects: they are greater, cheaper, and better documented. Regions with a high percentage of centenarians, described as Blue Zones, also do not share a common denominator in supplementation, and some demographic data from these areas is now questioned regarding the quality of records.

The sensible role of supplements is to fill specific gaps, not to replace the foundation. If the level of 25(OH)D is 14 ng/ml, a capsule addresses a real problem. If the diet lacks fish, fish oil makes sense. Once the foundation is laid, additional preparations shift biomarkers by values that no study has yet linked to longer life. Monitor effects objectively: 25(OH)D, fasting glucose, HbA1c, lipid profile, and high-sensitivity CRP every 6-12 months.

Frequently Asked Questions

Does any longevity supplement extend human life?

There is no such preparation. No randomized study has shown that an over-the-counter supplement extends human life. Data on lifespan comes from yeast, nematodes, and rodents. In humans, intermediate parameters are measured: NAD+ levels, inflammatory markers, insulin sensitivity. This is not the same as living longer.

Does NMN really work in humans?

NMN consistently raises NAD+ levels in the blood, as confirmed by a dosing study on 80 individuals (Yi et al., GeroScience, 2023). However, a systematic review of studies in older adults did not show improvements in muscle mass, grip strength, or walking speed (Prokopidis et al., Journal of Cachexia, Sarcopenia and Muscle, 2025). The biochemical effect is present, but the functional effect has not been confirmed.

What level of vitamin D is considered optimal in Poland?

Polish guidelines accept 30-50 ng/ml of 25(OH)D as the optimal range. In a study of 5775 adult Poles at the end of winter, the average concentration was 18.0 ng/ml, and only 9.1% fell within the optimal range (Płudowski et al., Pol Arch Med Wewn 2016). The level is checked through a blood test, not by guesswork.

Which of these supplements interact with medications?

Resveratrol at a dose of 1 g daily for four weeks inhibited three isoenzymes of cytochrome P450 in 42 healthy volunteers (Chow et al., Cancer Prevention Research, 2010), which applies to a large portion of prescription medications. At 4 g of omega-3 acids, more hospitalizations due to atrial fibrillation were noted, and vitamin K2 weakens warfarin. Each of these cases requires a discussion with a doctor.

Where to start if the budget is limited?

Start with testing 25(OH)D and correcting vitamin D deficiency, as this is the only item on this list with documented widespread deficiency in the Polish population. Then, consume fatty fish twice a week instead of capsules. NMN and resveratrol should be the last items on your shopping list.

You can find vitamin D3 with K2, omega-3 fatty acids, and curcumin in the category supplements, where we provide the composition directly on the product card. NMN or resveratrol are not included in this offer.

This article is for informational and educational purposes and does not constitute medical advice. Before starting supplementation, consult your doctor, especially if you are taking medications regularly, are pregnant or breastfeeding, or have a chronic illness.

Author: Michał Waluk · Opublikowano: 2026-06-02 · Aktualizacja: 2026-08-11