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Aeternum Reviews 2026: Are Its Longevity Supplements Legit or Hype?
By B Mishra, BSc Biology | Last checked: 14 November 2026
We checked Aeternum’s NMN, Urolithin A and Fisetin labels, prices, refund terms and the human research behind each ingredient. Here’s what holds up and what doesn’t.
Short answer: Aeternum is a longevity supplement store selling single-ingredient products such as NMN, Urolithin A and Fisetin. The labels are simple and the doses are clearly stated, which counts in its favour. But no Aeternum product has been tested in its own clinical trial, and the evidence for the ingredients ranges from moderate (Urolithin A) to early (Fisetin). Buy it for clean single ingredients, not for proven anti-ageing results.
Aeternum Reviews: Quick Snapshot
| Feature | Verified detail |
|---|---|
| What it is | Online store for longevity and anti-ageing supplements, skincare and a biological age test kit |
| Core products | NMN 500mg capsules, Urolithin A 500mg capsules, Fisetin 500mg capsules, GlyNAC, Marine Elastin, Silver Reverse hair range, skincare, bundles |
| Label style | Mostly single ingredients with the dose per capsule stated, not proprietary blends |
| Finished-product evidence | None found. The studies cited are ingredient studies, not tests of Aeternum’s capsules |
| Testing | Certificates of analysis are shown on product pages. The NMN certificate covers one sample lot |
| Example prices (UK display) | NMN 60 caps £23 · Fisetin 60 caps £35 · Urolithin A 60 caps £50. Bundle discounts: 10% off 2, 15% off 3 or more |
| Refund | 30 days from purchase, full refund, free return label on request |
| Shipping | International. Urolithin A is not shipped to the United States |
| Editorial score | 56/100 — Mixed |
Checked on 14 November 2026. Prices are shown in your local currency at checkout and can change.
Best for: people who already want NMN, Urolithin A or Fisetin and prefer simple, clearly dosed single-ingredient capsules.
Main strength: clear doses and modest prices for the category.
Main limitation: no product-level trials, and some store marketing goes further than the evidence supports.
Skip it if: you expect to feel younger, look younger or live longer because of a capsule. The human data doesn’t show that.
What Is Aeternum?
Aeternum is a direct-to-consumer brand that sells longevity supplements through its own online store at aeternum.site. Its range centres on compounds linked to cellular ageing research, including NMN (an NAD+ precursor), Urolithin A (studied for mitochondrial health), Fisetin (studied in senescence research) and GlyNAC.
It also sells skincare (the X19 Night Serum and Z21 Day Lotion), a grey-hair range, starter bundles and a biological age test kit. Support is by email (info@aeternum.site), and the returns address is in Florida, USA. Aeternum’s pages don’t clearly say where the products are manufactured, so we’ve treated that as not disclosed.
Aeternum Products Worth Knowing About
Most buyers come to Aeternum for one of three products. Here’s what each label shows and how much research sits behind the ingredient.
| Product | Label dose | Human research context | Evidence level | HealthyPa view |
|---|---|---|---|---|
| NMN capsules | 500mg per capsule. The label serving is 2 capsules (1,000mg) | Raises blood NAD+ reliably. A 65-person 2026 trial found 1,000mg/day NMN and NR raised NAD+ by similar amounts | Moderate for NAD+; weak for outcomes | The dose matches trials. Benefits beyond a blood marker are unproven |
| Urolithin A capsules | 500mg per capsule. The label serving is 2 capsules (1,000mg) | Randomised trials of Mitopure-branded UA at 500–1,000mg in middle-aged and older adults found modest gains in muscle strength and endurance | Moderate | The best-supported ingredient in the range, but those trials used a different manufacturer’s UA |
| Fisetin capsules | 500mg per capsule, 1 capsule per serving | Mostly cell and animal research. Early human studies report changes in blood senescence markers only | Preliminary | Speculative. Buy for the experiment, not for a proven effect |
| TND1128 | 100mg capsules | Research compound with little human data | Very limited | Not recommended by HealthyPa |
Does Aeternum Actually Work?
No Aeternum product has published clinical trial results of its own. Whether a product “works” depends on the ingredient research and whether the dose matches it. On that basis, Urolithin A has the strongest case, NMN reliably changes a blood marker without proven functional benefits, and Fisetin is still early.
NMN: the marker moves, the outcomes don’t (yet)
NMN reliably raises blood NAD+. In a 2026 randomised trial published in Nature Metabolism, 65 healthy adults took NR, NMN or nicotinamide for 14 days. NR and NMN raised circulating NAD+ by similar amounts; nicotinamide did not. The trouble is what happens next. A 2025 meta-analysis of randomised trials in adults over 60 concluded that current evidence doesn’t support NMN or NR for preserving muscle mass or function. A separate meta-analysis looked at blood sugar and lipids and found little benefit. Aeternum’s own product page mentions a 2024 trial in which NAD+ rose but the main physical test didn’t beat placebo.
Urolithin A: the best case in the range
In the ATLAS trial (Singh et al., 2022), 88 sedentary middle-aged adults took 500mg or 1,000mg of Urolithin A daily for four months. Muscle strength and some endurance measures improved compared with placebo. These were modest changes, and the trial’s primary endpoint, peak power output, was not significant. The trial used Mitopure, a Urolithin A ingredient from another company. Aeternum’s capsules have the same dose but haven’t been tested themselves.
Fisetin: interesting, unproven
Fisetin clears senescent cells in mice. Human data so far is small and mostly limited to blood markers. Several trials are still running. Treat any claim about lifespan, memory or “zombie cell clearance” as unproven.
Claim-by-claim evidence check
| Store claim | Evidence found | Confidence | Verdict |
|---|---|---|---|
| NMN boosts NAD+ | Consistent in human RCTs at 250–1,000mg | High | Supported |
| NMN slows ageing or extends life | No human evidence | None | Not supported |
| UA increases strength ~12% and endurance ~17% | Figures come from Mitopure trials in specific groups. The primary endpoint was not met | Moderate | Partly supported, overstated as a product claim |
| Fisetin clears senescent cells | Animal data plus small human biomarker studies | Low | Not established in humans |
| Third-party tested | Certificates shown on product pages; the NMN certificate covers one lot | Moderate | Partly verified |
| Company is fighting to “cure and/or stop aging” | No product can do this | None | Disregard |
Aeternum Side Effects and Safety
NMN, Urolithin A and Fisetin were generally well tolerated in short human trials. Reported side effects were mostly mild digestive upset. Long-term safety data beyond a few months is limited for all three. In the US, the FDA confirmed in September 2025 that NMN can legally be sold as a dietary supplement. That decision concerns legal status, not effectiveness.
Speak with a healthcare professional before using Aeternum products if you:
- are pregnant, breastfeeding or under 18 (Aeternum’s labels also exclude these groups)
- take blood thinners, diabetes medication or chemotherapy, or have a history of cancer (NAD+ and senescence pathways are involved in cancer biology)
- have liver or kidney disease
- plan to combine several longevity supplements at once
Aeternum Customer Feedback
Aeternum’s product pages show on-site reviews. On 14 November 2026, the Urolithin A page showed 24 reviews averaging 4.9, NMN showed 19 and Fisetin showed 17. The comments we read mostly mention steadier energy and simple packaging. These are reviews on Aeternum’s own store, so they’re likely to lean positive. We found no significant independent body of reviews. Customer feedback doesn’t prove a supplement works.
Aeternum Price, Refund and Where to Buy
Aeternum sells through its own website. Prices are shown in your local currency. These are the prices UK visitors saw on our check date:
| Product | Price (1 bottle) | Cost per day* | Multi-buy |
|---|---|---|---|
| NMN 500mg, 60 caps | £23 | £0.77 at 1,000mg/day (£0.38 at 500mg) | 10% off 2 · 15% off 3+ |
| Urolithin A 500mg, 60 caps | £50 | £1.67 at 1,000mg/day (£0.83 at 500mg) | 10% off 2 · 15% off 3+ |
| Fisetin 500mg, 60 caps | £35 | £0.58 at 500mg/day | 10% off 2 · 15% off 3+ |
*Calculated from the bottle price and the stated capsule dose.
Refund: Aeternum offers a 30-day satisfaction guarantee from the date of purchase, with a full refund and a free return label from info@aeternum.site. Orders processed through ClickBank follow ClickBank’s own refund terms. Shipping: worldwide, but Urolithin A is not available to US addresses.
Aeternum vs Buying a Big-Name Brand
Aeternum’s main appeal is price per milligram. For Urolithin A, Timeline’s Mitopure is the ingredient actually used in the published trials, so it has the stronger evidence link. Aeternum offers the same 500–1,000mg dose of Urolithin A from an undisclosed source. For NMN, a 2026 head-to-head trial found NR (such as Tru Niagen) and NMN raise NAD+ by similar amounts, so cost and testing should decide which you buy.
Aeternum Pros and Cons
Pros
- Single-ingredient capsules with clear doses
- NMN and UA doses match published trials
- Certificates of analysis are published
- 30-day full refund with a free return label
- Multi-buy discounts
Cons
- No trials of Aeternum’s own products
- Some marketing overstates the evidence
- Manufacturer and ingredient source not disclosed
- Email-only support
- Urolithin A not sold in the US
Aeternum FAQ
Is Aeternum legit?
Aeternum is a real online store with published refund terms, certificates of analysis and an email support address. That makes it a legitimate seller. It doesn’t make its anti-ageing claims proven.
Which Aeternum product has the best evidence?
Urolithin A. Randomised trials of 500–1,000mg daily found modest improvements in muscle strength and endurance. Those trials used Mitopure, not Aeternum’s product.
Does Aeternum ship worldwide?
Yes, to most countries. Urolithin A is not shipped to the United States. Check availability at checkout.
How long does Aeternum NMN take to work?
Blood NAD+ rose within 14 days in trials. Any noticeable benefit is unproven, so there’s no reliable timeline.
What is Aeternum’s refund policy?
30 days from the date of purchase for a full refund. Email info@aeternum.site for a free return label.
Is the Aeternum biological age test worth it?
The test kit gives an epigenetic age estimate. These clocks are research tools. A single result shouldn’t be used to judge whether a supplement is working.
Final Verdict: Is Aeternum Worth It?
Aeternum is a sensible place to buy NMN, Urolithin A or Fisetin if you’ve already decided to try them. The capsules are simple and fairly priced, the doses match the research, and the refund policy is easy to use. Of the three, Urolithin A is the strongest choice for people outside the US.
Score: 56/100 (Mixed). Product evidence 3/20 · Ingredient evidence and dose 12/20 · Label transparency 11/15 · Safety 10/15 · Company transparency 6/10 · Value 7/10 · Refund 4/5 · Support and availability 3/5. Biggest deductions: no trials of Aeternum’s own products, overstated marketing on some pages, and the manufacturer isn’t disclosed.
Sources
- Nature Metabolism (2026): NR, NMN and nicotinamide head-to-head trial in 65 adults
- Prokopidis et al. (2025), J Cachexia Sarcopenia Muscle: NMN/NR and muscle in older adults, meta-analysis
- Chen et al. (2025), Current Diabetes Reports: NMN and glucose/lipid metabolism meta-analysis
- Singh et al. (2022), Cell Reports Medicine: Urolithin A in middle-aged adults (ATLAS)
- Natural Products Association: FDA confirms NMN is not excluded from supplements (Sept 2025)
- Aeternum refund policy (checked 14 Nov 2026)
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