Longevity Supplements

Note on EU food-claims law. The research findings below describe what studies measured, not authorised EU health claims, and they may not be used in product marketing or labelling. Under Regulation (EC) No 1924/2006, the only health claims that may legally be made for any food or food supplement substance in the EU are those listed on the EU Register of nutrition and health claims (ec.europa.eu/food/food-feed-portal/screen/health-claims/eu-register). For most of the substances discussed here, no such authorised claim exists.

One honest truth before we get into pills: no supplement replaces the basics, and the biggest wins on aging still come from exercise, food, sleep, and stress management rather than what you swallow.

That said, some supplements have decent science behind them, and they can fix common shortfalls or nudge specific aging pathways in the right direction when the foundation is already in place.

When supplements make sense:

• Fixing a real, tested deficiency (like Vitamin D or B12)
• Covering at-risk groups (older adults, vegans)
• Fine-tuning specific markers (blood test numbers) with a doctor's input
• As a support to a healthy lifestyle, not a substitute

When they don't:

• As a fix for poor diet and no exercise
• Without knowing your baseline numbers
• Taking huge doses with no evidence behind them
• Chasing every shiny new "miracle" compound

The supplement industry is largely unregulated, quality is all over the map, and marketing often runs ahead of the science, so stay skeptical and favor brands with third-party testing of the actual capsule contents.

Talk to a healthcare provider before you start anything new, especially if you take medication or have a health condition.

DACH starter stack (Tier 1 evidence):

Supplement	Dose	Monthly cost (DACH)	Notes
D3 + K2 combo	D3 1,000 to 2,000 IU / K2-MK7 100 to 200 mcg	~€10 to 15	Widely stocked at dm, Rossmann, and most Apotheken
Omega-3 EPA+DHA	1,000 to 2,000 mg	~€15 to 25	Prefer the triglyceride form over ethyl ester
Magnesium glycinate or bisglycinate	200 to 400 mg	~€8 to 15	Skip the cheap oxide form. Absorption is poor
Creatine monohydrate	3 to 5 g/day	~€5 to 10	Creapure-labelled products are the DE quality standard
Tier 1 total		~€40 to 65/month

A quick word on where to buy in DACH: the Tier 1 basics (D3/K2, omega-3, magnesium, creatine) sit on drogerie shelves at dm and Rossmann at the lowest prices, and the same brands cost more inside Apotheken. Pharmacists can flag drug interactions and check your meds list, which the drogerie clerk cannot. Use the drogerie route for routine restocking, and use the Apotheke when you're starting a new stack or already on prescription drugs.

Test-before-you-supplement. Baseline panel worth ordering (ask your Hausarzt as IGeL or GKV if indicated): 25-OH vitamin D, Omega-3 Index (Cerascreen home test ~€65 to 80 via DACH Apotheken, or OmegaQuant direct), ferritin, B12, HbA1c, lipid panel, hs-CRP. Retest 25-OH D after 12 weeks and the Omega-3 Index after 4 months, since testing saves money and prevents overdoing fat-soluble vitamins that build up in body tissue.

EU legal status quick reference. NMN is not yet broadly authorised in the EU, but EFSA published a positive safety opinion on EffePharm/Uthever® NMN on 13 May 2026 (300 mg/day, excluding pregnant and lactating women). European Commission authorisation is pending and will be product-specific (see the NMN-Germany guide for the full picture). NR is EU-authorised (Regulation 2020/16). Melatonin status varies across DACH: Germany allows low-dose products (typically up to 1 mg) as a food supplement OTC at dm, Rossmann, and Apotheken, while higher-dose products like Circadin (2 mg prolonged-release) are prescription-only. Austria sells melatonin both as an OTC food supplement and as an Rx medicine, and Switzerland treats melatonin as prescription-only at any dose. Apigenin and magnesium glycinate are food-supplement-legal across DACH.

NAD+ (nicotinamide adenine dinucleotide, the molecule your cells need for energy production, DNA repair, and switching on sirtuins) drops as you age, but how much depends on the tissue you measure. Human skin studies suggest drops of around 50% across adult life, while cerebrospinal fluid (the liquid around your brain) shows a smaller drop of about 14%. No single number fits every tissue, which is why blanket claims about "NAD+ depletion" tend to overshoot the actual biology in any given organ.

NMN (Nicotinamide Mononucleotide): A direct building block for NAD+, with animal studies that look strong: better metabolism, more physical stamina, improved insulin sensitivity, and longer lifespan in some models.

Human evidence is growing but still early. Studies show NMN is safe and does raise NAD+ levels, and people have seen gains in muscle function, heart and blood vessel health, and some metabolic markers. Long-term effects are still unknown.

Typical doses in studies: 250 to 500 mg daily.

NR (Nicotinamide Riboside): Another NAD+ precursor with a bit more human research behind it, and the branded form NIAGEN has clinical trials showing it safely raises NAD+ levels.

NR may absorb better than NMN, though head-to-head comparisons are limited.

Typical doses: 300 to 1,000 mg daily.

The bottom line: NAD+ boosters are among the more promising longevity supplements, the biological logic is solid, and the evidence is growing, but long-term human data is still missing. They're relatively expensive and make more sense once you've nailed the lifestyle basics.

Regulatory note: In November 2022 the US FDA excluded NMN from dietary supplements under FD&C Act §201(ff)(3)(B) (prior drug-investigation exclusion). After a Natural Products Association / Alliance for Natural Health citizen petition and a stayed federal lawsuit, the FDA on 29 September 2025 issued a petition response reversing that determination, with a follow-on response letter to ingredient supplier SyncoZymes dated 2 December 2025 and a parallel letter to Inner Mongolia Kingdomway shortly after (NutraIngredients reporting, 9 December 2025). NMN may now be lawfully marketed as a US dietary ingredient, though this was a docket-level response and not a Federal Register notice. NR keeps its GRAS (Generally Recognized as Safe) status. EU is different. As of May 2026, EFSA published a positive safety opinion on EffePharm/Uthever® NMN on 13 May 2026 (300 mg/day, excluding pregnant and lactating women), and European Commission authorisation typically follows 5 to 7 months later and will be product-specific. NR is EU-authorised under Commission Implementing Regulation (EU) 2020/16. See the NMN-Germany guide for the full EU picture.

Cancer caveat (important). Pre-clinical work (Nacarelli et al., Nat Cell Biol 2019; Lv et al., Cell Metab 2021) shows NAD+ metabolism via NAMPT drives the pro-inflammatory senescence-associated secretory phenotype, and in some models it can also support tumour metabolism. This has not been refuted in 2023 to 2026 reviews, so people with active or recently treated cancer should not take NMN or NR without oncology input.

Vitamin D shortfalls are everywhere, with up to 40% of adults in Western countries coming up low on blood-test panels. That matters for aging because Vitamin D shapes hundreds of genes tied to immunity, bones, muscle, and inflammation in tissues across the whole body.

Recent longevity research: A sub-study of the VITamin D and OmegA-3 TriaL (VITAL) reported that daily Vitamin D3 supplementation slowed leukocyte-telomere shortening over four years versus placebo (Zhu et al., Am J Clin Nutr 2025, and press coverage translated the effect into "≈ 3 years of typical aging." This is not an authorised EU health claim, and you should read it as a research finding on a proxy marker rather than as a biological-aging benefit attributable to Vitamin D3 supplementation. Telomere length is a surrogate for cellular ageing, not a direct measure of biological age, and the main VITAL trial found mostly flat results for Vitamin D on cancer and cardiovascular outcomes overall. The only EU-authorised vitamin-D aging-adjacent claim is the Article 14 reduction-of-disease-risk wording on falls in adults ≥60 at 20 µg/day.

Benefits with strong evidence:

• Bone health and fewer fractures
• Immune support
• Holding onto muscle strength
• Lower all-cause death rates (in people who are deficient)

Optimal levels: The 2024 Endocrine Society guideline no longer endorses a specific serum 25(OH)D threshold for healthy adults under 75, and routine population-wide screening is not recommended. Many longevity-focused practitioners aim for 40 to 60 ng/mL (100 to 150 nmol/L), but that target is not a mainstream guideline position. Most people need 1,000 to 2,000 IU daily to maintain adequate levels, and 5,000 IU should only be used with periodic blood monitoring.

Vitamin D3 vs D2: D3 (cholecalciferol) raises blood levels better than D2 (ergocalciferol), so go with D3.

Pairing with Vitamin K2: D3 is often combined with Vitamin K2 (menaquinone-7) because the two vitamins share calcium-handling pathways. The popular "K2 directs calcium into bone rather than arteries" framing is mechanistic shorthand from in-vitro and observational work (matrix-Gla-protein activation), and it is not an authorised EU health claim. EFSA twice issued non-favourable opinions on cardiovascular/arterial claims for vitamin K2: once for menaquinone-7 and the function of the heart and blood vessels (EFSA Journal 2012;10(7):2714, ID 125), and once for the MenaQ7® / maintenance of arterial elasticity Article 13(5) application (EFSA Journal 2020;18(6):5949). The only authorised wording under Regulation (EU) 432/2012 is "Vitamin K contributes to normal blood clotting" and "Vitamin K contributes to the maintenance of normal bones".

Test your levels before you start, because Vitamin D is fat-soluble and can build up in body fat, so dose according to what your blood shows.

Omega-3 fatty acids, especially EPA and DHA from fish oil, have decades of research behind them for heart and brain health, and they're also linked to living longer in large observational cohorts.

Longevity evidence: An analysis of the Framingham Offspring Cohort (McBurney et al., American Journal of Clinical Nutrition, 2021; 2,240 adults, average age around 65) found that the difference in life expectancy at age 65 between the highest and lowest omega-3 index quintile matched the difference between non-smokers and current smokers, roughly 4.7 years. This comparison framing was first stated by co-author Sala-Vila in press coverage, and it was not a benefit attributable to omega-3 supplementation. A bigger pooled analysis of 17 studies (42,466 people; FORCE consortium, Nature Communications, 2021) found 15 to 18% lower all-cause death risk (top vs. bottom fifth, depending on which fatty acid). Both are observational, and they show a population-level association rather than a guaranteed life-expectancy gain from taking a pill.

Why they help:

• Lower inflammation (the omega-3 to omega-6 ratio matters)
• Better heart markers (triglycerides, blood pressure)
• Support brain structure and function
• May protect against cognitive decline

Food vs supplements: Eating fatty fish (salmon, sardines, mackerel) 2 to 3 times a week covers most people, and supplements help if you don't eat fish or need higher doses for medical reasons.

Picking a supplement:

• Look for combined EPA + DHA of 1,000 to 2,000 mg daily
• Choose products tested for purity (heavy metals, oxidation)
• Triglyceride form may absorb better than ethyl ester
• Algae-based options work for vegetarians

AF safety signal at higher doses. REDUCE-IT (Bhatt et al., NEJM 2019; 4 g/day icosapent ethyl, EPA-only) and STRENGTH (Nicholls et al., JAMA 2020; 4 g/day omega-3 carboxylic acid, EPA+DHA) both showed an increase in new-onset atrial fibrillation at high-dose pharmaceutical omega-3. If you have prior arrhythmia, paroxysmal AF, or cardioversion history, discuss dose with your cardiologist before exceeding 1 g/day.

Testing: The Omega-3 Index blood test measures EPA+DHA as a percentage of red blood cell membranes, and a target of 8 to 12% is promoted by OmegaQuant (the Harris lab that developed the test) as linked to the lowest cardiovascular risk. This is not an official AHA or ESC guideline target, and neither organisation currently recommends omega-3 supplements for primary prevention in average-risk adults (post VITAL/STRENGTH/ASCEND). Most Western populations sit at 4 to 5%.

A few more supplements have evidence worth knowing about for healthy aging, with a sliding scale from "backed by EU-authorised claims" all the way down to "interesting mouse data, no human RCTs."

Resveratrol Found in red grapes and wine, with early work suggesting it activates sirtuins (proteins tied to longevity). Then Pacholec et al. 2010 (J Biol Chem) showed a large part of the in-vitro SIRT1 activation was a fluorophore assay artifact, animal studies are mixed, and human RCTs are mostly small and underwhelming with poor bioavailability. If you still want to try it, pick trans-resveratrol and take it with fat. EU adult food-supplement cap: 150 mg/day under Commission Implementing Decision (EU) 2016/1190 (OJ L 196, 21.7.2016, p. 53; codified in Reg (EU) 2017/2470). Products that exceed 150 mg per daily portion are outside the EU novel-food authorisation and should not be marketed in the EU.

Fisetin and Quercetin (senolytics) Plant compounds studied for clearing senescent "zombie" cells (old cells that refuse to die and drive inflammation), and they sit on different evidence bases worth pulling apart. Fisetin had positive standalone mouse lifespan data in Yousefzadeh 2018 (EBioMedicine), but the more rigorous NIA Interventions Testing Program (ITP, 2023) failed to replicate any lifespan benefit in mice, and small human trials are ongoing. Quercetin's senolytic evidence is almost entirely as the D+Q combination with dasatinib (a prescription cancer drug), not standalone (see Zhu 2015 Aging Cell onwards). Typical dosing cycles are a few days per month, not daily, the research is early, and self-experimenting with dasatinib is not recommended.

CoQ10 (Ubiquinone / Ubiquinol) Your cells need this for their energy factories (mitochondria), levels drop with age, and it may support heart function and energy. Two forms are sold, ubiquinone (oxidized) and ubiquinol (reduced), and marketing pushes ubiquinol as 2 to 3 times more bioavailable, but the independent picture is more nuanced. Plasma equilibrates to roughly 95% ubiquinol regardless of which form you swallow, and the López-Lluch 2019 Nutrition review concluded that carrier lipids and solubilization drive bioavailability more than redox form, so a well-formulated ubiquinone soft-gel can match a poorly-formulated ubiquinol capsule. The strongest "ubiquinol wins" pharmacokinetic data is largely from Kaneka-funded work (Kaneka makes the dominant ubiquinol ingredient). Ubiquinol may have a defensible edge for statin users, older adults, or anyone with poor fat absorption, and otherwise either form taken with a fat-containing meal is fine. See the dedicated CoQ10: Ubiquinol vs Ubiquinone guide for the full funding map and DACH product table, and the Mitochondria guide for the wider mitochondrial context. Typical dose: 100 to 200 mg/day with food.

Creatine Well-researched for holding onto muscle and strength, which matters a lot as you age. The EU Register authorises two creatine claims under Reg (EU) 432/2012 at 3 g/day: "Creatine increases physical performance in successive bursts of short-term, high intensity exercise" and (in adults over 55, with resistance training) "Daily creatine consumption can enhance the effect of resistance training on muscle strength". Growing research on cognitive and brain effects under sleep deprivation or high cognitive load is plausible but not on the EU Register, so treat it as a research finding rather than an authorised benefit claim. Long safety record at 3 to 5 g/day in healthy adults.

Magnesium A critical mineral that most people don't get enough of, with your body using it in 300+ enzyme reactions across the cell. Supports sleep, stress response, and heart and blood vessel health, and forms like glycinate or threonate may absorb better than the cheaper oxide form. Typical dose: 200 to 400 mg daily.

Taurine (what changed since 2023) Singh et al., Science 2023, reported that taurine supplementation extended lifespan by ~10-12% in mice and improved age-related markers in primates and humans, and the paper drove a wave of consumer interest. A June 2025 NIH/NIA study in Science (Fernandez et al., senior author Rafael de Cabo) used three human cohorts (Balearic Islands Study of Aging, Atlanta Predictive Medicine Research cohort, plus rhesus-monkey and mouse longitudinal data) and found that circulating taurine concentrations either remained stable or increased with age, meaning taurine is unlikely to be a useful biomarker of aging. A separate Aging Cell 2025 paper (Marcangeli et al. found no link between circulating taurine and muscle strength or mass in humans. Taurine is generally safe at 1-3 g/day in healthy adults, but long-term human RCTs with hard endpoints don't exist yet, so treat it as plausible-but-unproven rather than as a confirmed longevity supplement.

Not every supplement marketed for longevity is worth your money: some don't do much, and others can actively cause harm at the doses that show up on shop shelves and online.

Red flags:

• Mega-doses of antioxidants: High-dose Vitamin E, beta-carotene, and Vitamin A have shown harm in clinical trials. More is not better.

• Proprietary blends: When labels hide ingredients behind "proprietary blend," you can't see the actual doses.

• Unproven "anti-aging" compounds: New molecules with no human safety data. Let someone else go first.

• Products with miraculous claims: If it sounds too good to be true, it is. No pill will get you to 150.

• Cheap, untested products: Unknown brands, no third-party testing, suspiciously low prices.

Supplements with concerning evidence:

• High-dose Vitamin E: Linked to higher death rates when you look across many studies
• Beta-carotene supplements: Higher lung cancer risk in smokers
• Iron (unless you're deficient): Excess iron acts as a pro-oxidant and causes harm
• Calcium supplements: Some studies hint at a possible link to heart and blood vessel risk; get calcium from food first

General principles:

1. Test, don't guess. Know your numbers before supplementing.
2. Start low and go slow. Begin with smaller doses.
3. Quality matters. Pick third-party tested products.
4. Less is often more. A few solid picks beat a cabinet full.
5. Reassess every so often. Your needs shift over time.