REAL PEOPLE. TESTED PRODUCTS. NO HYPE.

A UK-based longevity supplement company founded on one principle: if we wouldn’t take it ourselves, we won’t sell it to you.
A UK-based longevity supplement company founded on one principle: if we wouldn’t take it ourselves, we won’t sell it to you.
(4.7) From over 30,000 customers

Our Story

Nothing was wrong. That was the problem.

As we got into our 40s, we both noticed the same thing. Not illness. Nothing a doctor could point to on a blood test. Just... less. Less energy. Slower recovery. That feeling of not quite running at full capacity anymore.

Lee first heard about NAD+ and NMN through a conversation with a friend. Like most people in the UK, the initial reaction was scepticism. Another supplement claiming to change everything? We'd heard it before.

But the research was different. Not influencer hype, actual peer-reviewed science. The Yoshino 2021 clinical trial. The published data on NAD+ declining by roughly 50% by middle age. Studies in Nature and Cell. The more we read, the harder it became to dismiss.

So we tried it. Ordered NMN from Amazon. Took it for 4 weeks. Felt nothing.

That could have been the end of the story. Except we discovered something that changed everything: independent testing found that 64% of NMN products on Amazon contain less than 1% actual NMN. We hadn't tried NMN. We'd tried an expensive placebo.

When we finally sourced properly tested, high-purity NMN with a Certificate of Analysis we could actually verify, the difference was undeniable. Not overnight. Not dramatic. But after a few weeks, that persistent 3pm crash wasn't there anymore. We felt more like ourselves.

That's when we decided: if it was this hard for us to find, and we were actively looking, how many people were giving up after trying a useless product from Amazon?

Longevity Plus exists to solve that problem.

Founder / Team Profiles

Lee Davies

Co-Founder

Around the age of 40, I began taking my health far more seriously. I realised that if I wanted to feel strong, energetic, and capable as I got older, I needed to start investing in my body, not just reacting when problems appeared.

Like many people, I started with the gym. But very quickly I became fascinated by nutrition and lifestyle. I began experimenting with cleanses, fasting, and removing certain foods from my diet. The changes were undeniable, my skin improved, joint discomfort disappeared, my sleep became deeper, and I simply felt better day to day.

That experience sparked a deeper curiosity. I started exploring supplements and the role they could play in supporting energy, recovery, and long-term wellbeing. To my surprise, I found that certain supplements made a genuine difference. I felt more energised, clearer mentally, and in many ways, younger.

As I researched further, one thing became clear, high-quality supplements were often expensive, inconsistent in purity, or filled with unnecessary additives. I wanted access to products that were not only effective, but clean, trustworthy, and fairly priced.

Eventually, I discovered I could manufacture supplements myself, sourcing premium ingredients, maintaining strict purity standards, and removing anything unnecessary. Along the way, I worked closely with scientists, nutritional experts, and experienced formulators to ensure every product was grounded in research, carefully developed, and genuinely beneficial.

That was the beginning of what would become Longevity Plus.

Today, our mission is simple: to provide high-quality, clean, and effective supplements that help people feel healthier, more energised, and confident in the products they take — without paying inflated prices.

Because longevity isn’t just about living longer — it’s about feeling better while you do.

Stephen Williamson

Co-Founder

I've spent over 15 years building businesses, and a good chunk of that has been in the supplement industry. That experience showed me something most customers never get to see: how easy it is to cut corners. How few brands bother with proper independent testing. How often what's on the label has almost nothing to do with what's in the bottle.

Around 40, I started noticing the same thing Lee did. Not anything a doctor would flag, just less energy, slower recovery, that feeling of not quite running the way I used to. I'd been around supplements long enough to know most of what's sold online is barely worth taking. But when I started researching longevity science properly, the evidence behind compounds like NMN and NAD+ was hard to ignore.

The problem was finding products I actually trusted. I knew what the industry looked like from the inside. Most of what was available didn't meet the standard I'd want for myself, let alone to sell to someone else.

That frustration is what led to Longevity Plus and a fairly stubborn obsession with making sure everything we sell is independently tested and properly transparent.

Dr. Lydia Smith

Scientific Advisor Role

Lydia Smith is a biochemist with 25 years of experience in nutrition. She reviews every product in the Longevity Plus range for safety, efficacy, and dosing, and advises on how our products can be taken together.

"My role is straightforward: make sure everything Longevity Plus sells is backed by evidence and safe to take. If the research isn't there, it doesn't go on the website."

What We Stand For

Every batch tested. Every result published.

The UK supplement market has a quality problem. Independent testing has found that the majority of popular supplements sold on Amazon contain a fraction of what's claimed on the label.

That's not a rounding error, that's a trust problem.

We test every batch of every Longevity Plus product with independent, third-party laboratories. We publish the Certificate of Analysis on our website.

Not because we have to. Because we think you have a right to see exactly what you're putting in your body.

Everything in one place.

We built the store we wished existed when we started looking. Over 30 products, all independently tested, all with published results. No hunting across five different websites and hoping for the best.

From NMN and NAD+ to magnesium, collagen, and resveratrol, everything we sell goes through the same testing process. One store. One standard.

We also don't believe quality should come with a premium price tag. Same rigorous testing, same high purity, without the markup.

Built for people like us.

We're not biohackers. We're not trying to live forever. We're two blokes in our 40s who got tired of feeling like we were running at half capacity and didn't want to spend the next 30 years accepting that as normal.

Every product we sell is formulated with input from qualified scientists and nutritional experts, but the brief we give them is simple: would we take this ourselves? Would we give it to our family? If the answer is no, it doesn't make it onto the site.

Every
batch

Full
transparency

North Yorkshire

Pharmaceutical grade

10000+
reviews

Frequently Asked Questions

  • How long before I notice anything?

    Most of our customers notice changes within 2 to 4 weeks. The most common thing we hear is "I didn't feel dramatically different, I just realised the 3pm crash had stopped" or "I felt more like myself again." It's gradual. A lot of people say they notice it most when they stop taking it for a week and the old tiredness comes back.

  • Do you offer refunds?

    Yes. We offer a 90-day money back guarantee on all products. If it's not right for you, return it for a full refund. No awkward questions, no hoops to jump through.

  • Are your products safe to take together?

    Yes. Many of our customers take several of our products as part of a daily routine. Common combinations include NMN with resveratrol and TMG, or magnesium glycinate alongside NMN for sleep support. If you're unsure what works together or where to start, get in touch and we'll help.

  • What if NMN affects my sleep?

    This is common in the first few weeks and it's actually a sign it's working. NMN supports your body's energy production, so if you take it too late in the day you might feel too alert at bedtime. The fix is simple: take it in the morning on an empty stomach. Most people who had sleep issues say this solved it within days.

  • How can I be certain of the purity?

    We make sure our products are tested for purity, we even go as far to make sure they are not only tested independently, but also by local companies that you can trust.

  • Is NMN legal in the UK?

    Yes, fully legal. NMN is classified as a food supplement in the UK. In the US, the FDA has attempted to reclassify it, which has caused some confusion. But in the UK there are no restrictions on buying or taking NMN.

  • Are you based in the UK?

    We are based Newbury, Berkshire, UK.

  • Where are your supplements manufactured?

    Some of our products are manufactured in the UK, and we're moving more of our production here as we grow. For products sourced internationally, every single batch is independently tested for purity and quality before it reaches you. We publish the results on our website because we think you should be able to verify what you're taking, not just take our word for it.

  • Where are our supplements shipped from?

    We ship from our facilities in the UK and Hong Kong, depending on the product. Most orders arrive within 5 to 10 working days, and delivery is free on all orders over £20.

  • How long does delivery take?

    Almost all shipments arrive within 1 to 2 weeks of ordering, or around 5 to 10 working days.

  • What is NMN?

    NMN, also known as Nicotinamide Mononucleotide, is a natural compound derived from niacin (vitamin B3) and serves as a precursor to NAD+, a vital molecule found in all living cells. In essence, NMN functions as a natural supplement aimed at elevating the levels of NAD+ within your cells. NAD+ plays a crucial role in cellular energy production, but its levels naturally diminish with age. By supplementing and enhancing NAD+ levels, we can potentially boost our energy generation and rejuvenate our cells to function akin to their youthful state.

  • What is NAD?

    NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme present in all cells, vital for energy production and DNA repair. It supports mitochondria in converting nutrients into ATP (our energy currency), while also helping manage oxidative stress and regulate gene expression. NAD+ levels decline with age, potentially affecting metabolism and vitality. Supporting NAD+—through lifestyle habits like exercise and balanced nutrition or via supplements—can help maintain energy, cognitive performance, and overall health.