★★★★★
4.9/5 from 1,200+ Verified Optimisers
What The World's Longest-Lived People Ate Daily

They Weren't Taking NMN.
They Were Eating Seaweed.

Okinawa. South Korea. Coastal Japan. Brown seaweed, every single day, for centuries. In 2017 researchers finally isolated the compound responsible: fucoidan.

Standardised to >95% fucoidan. Most "seaweed extract" on the market is under 20%. You are paying for the molecule, not the filler.

Wild-harvested North Atlantic. Fucus vesiculosus from cold, low-contaminant waters. Solvent-free water extraction.

UK-lab verified, every batch. Third-party tested for purity and heavy metals. Certificate of Analysis on request.

First month £30.00£22.50 with code NEWSUB25

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Fucoidan Research Published In

Six Centuries Before The Lab

The Diet Came First.
The Science Followed.

The world's longest-lived populations were never taking supplements. They were eating brown seaweed — daily, as an ordinary part of the meal, for generation after generation.

Okinawa One of the original Blue Zones. Among the highest concentrations of centenarians on Earth.
South Korea The highest per-capita seaweed consumption in the world, sustained for centuries.
Coastal Japan Brown seaweed woven through the daily diet long before anyone knew why it mattered.

Researchers spent decades asking what these populations had in common. Genetics didn't explain it. Climate didn't explain it. The diet kept pointing back to the same place — the seaweed.

In 2017, a research team finally isolated the compound responsible. A complex sulfated polysaccharide found in the cell walls of brown seaweed, most abundantly in Fucus vesiculosus.

Its name is fucoidan. It has since become one of the most rigorously studied marine molecules in human research.

"The tradition ran for six hundred years before anyone tested it. The diet came first. The science followed."

Standardised fucoidan extraction from wild North Atlantic Fucus vesiculosus
From Food To Molecule

So Why Not Just
Eat The Seaweed?

It is a fair question, and it has a straightforward answer. Raw brown seaweed contains fucoidan in small and highly variable amounts — the concentration shifts with species, season, water temperature and harvest location. Two handfuls from the same coastline can differ substantially.

The intakes used in published research are simply not reachable through diet in any practical way. Eating your way there would mean consuming seaweed in quantities no one outside a coastal food culture is realistically going to manage — and bringing everything else in the seaweed along with it.

The part most people miss

Seaweed is a natural accumulator. It draws in whatever is in the water around it — including iodine and heavy metals. That is exactly why sourcing water matters, why extraction method matters, and why third-party testing is not optional.

So we did what the research did. We isolated the molecule, standardised it to a known concentration, and had it verified independently — so that every capsule delivers the same 250mg, every single time.

>95% Standardised

Not "seaweed powder." A known concentration of the actual molecule, batch after batch.

Solvent-Free Extraction

Clean water process. No chemical solvent residues carried into the finished capsule.

Cold North Atlantic

Wild-harvested Fucus vesiculosus from low-contaminant northern waters.

Independently Tested

UK third-party lab verification for purity and heavy metals. COA on request.

See the full purity breakdown →
  • ★★★★★

    No Fillers, Just Science

    Most supplements are packed with junk you don't need. I love that this is just pure Fucus vesiculosus extract. It’s simple, transparent, and backed by research. No marketing fluff, just results.

    Mark B. — Bedfordshire, UK

  • ★★★★★

    The Missing Piece for my NAD+ Protocol

    I’ve been on an NMN protocol for nearly two years, but I always felt like something was missing, I wasn't getting the energy levels I expected, adding Fucoidan was a real game changer!

    David H. — Manchester, UK

  • ★★★★★

    Transparency I Can Trust

    It’s rare to find a brand that actually shows their working. I’m quite picky about what I put in my body, so seeing the 3rd party UK lab reports for every batch was the deciding factor for me. The solvent-free extraction makes me feel confident that I’m getting the purest form of Fucoidan available.

    Sarah M. — London, UK

  • ★★★★★

    Finally, a SIRT6 Activator that Works

    I’ve tried various brown seaweed extracts in the past, but most are just under-dosed or poor quality with fillers. You can tell this is different, the concentration is clearly high grade. It has become a non-negotiable part of my daily longevity stack.

    James P. — Hertfordshire, UK

    Purity & Provenance

    Not All Fucoidan
    Is Created Equal.

    "Seaweed extract" is not a regulated term. Two bottles on the same shelf can contain wildly different amounts of the actual molecule — and most labels will never tell you which is which. Here is exactly what separates ours.

    Specification Typical Seaweed Extract Prime Ageing Fucoidan
    Active Fucoidan Commonly under 20% >95% Standardised
    Species Declared Often a generic "kelp blend" Fucus vesiculosus
    Source Waters Frequently unstated Wild-harvested, North Atlantic
    Extraction Method Chemical solvent common Solvent-Free Water Extraction
    Third-Party Testing Rarely published UK Lab Verified, Every Batch
    Heavy Metals & Iodine Seldom disclosed Tested & Declared — COA On Request
    Fillers & Binders Bulking agents common Zero. Vegetable Capsule Only.
    Daily Protocol Often 3–6 capsules One Capsule. 250mg.
    The Verdict You cannot know what you bought Verified
    Active Fucoidan
    Typical

    Commonly under 20%

    Prime Ageing

    >95% Standardised

    Third-Party Testing
    Typical

    Rarely published

    Prime Ageing

    UK lab verified, every batch

    Species Declared
    Typical

    Often a generic "kelp blend"

    Prime Ageing

    Fucus vesiculosus

    Extraction Method
    Typical

    Chemical solvent common

    Prime Ageing

    Solvent-free water extraction

    Heavy Metals & Iodine
    Typical

    Seldom disclosed

    Prime Ageing

    Tested & declared, COA on request

    Fillers & Binders
    Typical

    Bulking agents common

    Prime Ageing

    Zero. Vegetable capsule only.

    Daily Protocol
    Typical

    Often 3–6 capsules

    Prime Ageing

    One capsule. 250mg.

    The Verdict
    Typical

    You cannot know what you bought

    Verified

    "Typical seaweed extract" reflects commonly available unstandardised products where fucoidan content and testing data are not disclosed on the label. We publish ours. If you want to see the Certificate of Analysis for the batch you receive, ask us and we will send it.

    Get >95% Verified Fucoidan — 25% Off Free UK delivery · 30-day money-back guarantee · Cancel anytime
    Standardised & UK-Lab Verified

    Premium Fucoidan
    >95% Standardised

    30-Day Supply • 30 Capsules • One Daily

    The same molecule the longest-lived populations on Earth ate every day — isolated, standardised, and independently verified. Wild-harvested Fucus vesiculosus from the cold North Atlantic, water-extracted without solvents, tested in a UK lab before it reaches you.

    Specification

    Active Fucoidan Purity >95% (UK Lab Verified)
    Standardised Dose 250mg Per Serving
    Species Fucus vesiculosus
    Extraction Method Solvent-Free Water Extract
    Origin Wild-Harvested, North Atlantic
    ZERO FILLERS VEGAN (HPMC) COA ON REQUEST
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    £30.00 £22.50 Every 30 Days
    One-Time Supply Try a single 30-day bottle. 20% off applied automatically.
    £30.00 £24.00 Single Bottle

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    Give it a full 30 days. If it isn't for you, return an unopened bottle for a 100% refund, or an opened one under our 50% Fair-Try refund. No forms, no friction — just email us.
    Prime Ageing Premium Fucoidan — >95% standardised, UK-lab verified

    So What Has The Research Actually Looked At?

    A fair question, and one most supplement brands dodge. Fucoidan has been studied across three distinct areas. Here is what those researchers were investigating — described plainly, without us pretending the science says more than it does.

    Area One

    The Gut Barrier

    This is the part most people miss. Fucoidan's sulfated structure resists stomach acid, so a meaningful portion reaches the lower intestine intact. Research here has focused on the intestinal lining itself — the mucus layer that separates gut bacteria from the gut wall — rather than on the bacteria a probiotic would target. Traditional use of bladderwrack for digestive and intestinal health long predates any of this work.

    Evidence Base Mechanistic and preclinical studies on intestinal barrier function and mucin-associated species. Traditional use recorded across northern European coastal populations.
    Area Two

    Inflammatory Pathways

    A substantial share of published fucoidan research examines how the molecule interacts with signalling pathways involved in the inflammatory response — NF-κB among them. Much of this work is laboratory and animal research rather than human trials, which is exactly why we're telling you that rather than showing you a graph.

    Evidence Base Predominantly in-vitro and animal-model research. Human data in this specific area remains limited.
    Area Three

    SIRT6 & Genomic Stability

    SIRT6 is one of seven sirtuin proteins, and the one most closely associated with DNA repair and genomic maintenance. In 2017 a research team identified fucoidan as a direct activator of the SIRT6 enzyme. In 2025 a follow-up paper reported effects in living organisms rather than cell culture.

    Evidence Base Enzyme-level identification (2017) and in-vivo animal work (2025). Not yet demonstrated in human clinical trials.

    How To Take It

    No loading phase. No cycling. No powder to choke down.

    One Capsule

    250mg standardised fucoidan. Taken with food, morning or evening — whichever you'll actually remember.

    Every Day

    Consistency is the whole point. Anchor it to something you already do and a missed day is no setback.

    Alongside Your Stack

    Sits comfortably with NMN, resveratrol, vitamin D or omega-3. No known interactions between them.

    Common Questions

    Straight answers. If yours isn't here, email us and a human will reply.

    Speak to your GP or pharmacist first. Fucoidan is a sulfated polysaccharide with a structure related to heparin, and it has been studied for anticoagulant activity. If you are taking warfarin, apixaban, rivaroxaban, clopidogrel, aspirin or any other blood-thinning medication — or if you have a bleeding disorder or surgery scheduled — do not start without medical advice. We would rather lose the sale than have you take something that isn't right for you.

    The most honest answer we can give you: 250mg of a compound that has been studied more seriously than almost anything else on the longevity shelf, at a purity most brands won't match and won't disclose. What we can promise precisely is what's in the capsule, where the seaweed was harvested, how it was extracted, and who tested it — all of which we'll show you in writing. What we won't do is promise you a specific outcome by a specific date, because the honest state of the evidence doesn't support that and anyone telling you otherwise is guessing. If that candour doesn't appeal, we're probably not the brand for you — and that's a reasonable conclusion to reach.

    We won't give you a countdown, because we'd be inventing it. Fucoidan is not a stimulant and there's no credible "by day fourteen you'll feel X." Think of it the way the populations who inspired this product did — seaweed wasn't a fortnight's intervention in Okinawa or coastal Korea, it was something eaten daily across a lifetime. Most of our subscribers treat it as long-term cellular maintenance rather than a short-term fix. Our guarantee runs for 30 days precisely so you can decide for yourself whether it earns a place in your routine, with nothing at stake if it doesn't.

    Seaweed naturally contains iodine, and our extract is no exception — we test and declare the iodine content of every batch, and the Certificate of Analysis is available on request. If you have hypothyroidism, hyperthyroidism, Hashimoto's, a history of thyroid nodules, or you take levothyroxine or carbimazole, please check with your doctor before starting and take the COA figure with you. The same applies if you are pregnant or breastfeeding.

    Yes. Fucoidan is a distinct compound and there is no known reason it cannot sit alongside NMN, NR, resveratrol, vitamin D, magnesium or omega-3. Most of our customers take it in the morning with the rest of their routine. If you are on prescription medication of any kind, check with your pharmacist first — that advice applies to every supplement, not just ours.

    You can, and coastal populations have done exactly that for centuries. The difficulty is consistency: fucoidan content in raw seaweed varies enormously by species, season and harvest location, and seaweed also accumulates iodine and heavy metals from the water around it. A standardised extract gives you the same 250mg, from a declared species, from tested waters, every single day — which is something a bag of dried kelp cannot.

    Three things. Purity — ours is standardised to over 95% fucoidan, where a lot of "seaweed extract" on the market is well under 20% and does not declare the figure at all. Extraction — we use a solvent-free water process, so there is no chemical solvent residue carried into the capsule. Verification — every batch is tested by an independent UK lab, and we will send you the Certificate of Analysis for your batch if you ask for it. Most brands will not.

    250mg of fucoidan extract standardised to over 95%, from wild-harvested Fucus vesiculosus, in a vegetable (HPMC) capsule. That is the complete list. No bulking agents, no flow agents, no magnesium stearate, no rice flour, no "proprietary blend." Suitable for vegans and vegetarians.

    Your first month is 25% off, then 10% off for as long as you stay. A fresh 30-day supply ships automatically before you run out, with free UK delivery every time. You can skip a month, change the delivery date, or cancel entirely from your account in two clicks — no phone call, no retention script, no notice period. Cancel after one bottle if you want to.

    Our 30-Day Fair-Try Guarantee: return an unopened bottle for a full refund, or an opened one for a 50% Fair-Try refund. Email us and we will sort it — no forms, no interrogation.

    The Diet Came First.
    The Science Followed.

    >95% standardised fucoidan. Wild-harvested from the North Atlantic. Verified by a UK lab, batch after batch. One capsule a day.

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