An editorial guide compiled by our research team. This article is for general information only and is not a substitute for personalised medical advice. Always consult your GP before starting new supplements, particularly if you have a medical condition or take medication.
How to read this guide: the mechanism-first approach
Most longevity supplement guides give you a ranked list — “the #1 best supplement,” “the #2 best,” and so on. That approach has a problem: ageing isn’t a single process, so there’s no single “best” supplement.
Ageing is driven by multiple distinct biological mechanisms operating in parallel. A supplement that brilliantly addresses one mechanism (say, NAD+ decline) does nothing for another (say, cellular senescence). The sophisticated approach — the one used in longevity medicine — is to understand the mechanisms first, then select the supplements that target the mechanisms most relevant to you.
This guide is therefore organised by mechanism, not by rank. For each of the six major longevity mechanisms, we explain the science, then identify the best supplement options available in the UK in 2026. By the end, you’ll be able to build a personalised longevity protocol that targets the mechanisms that matter most for your goals — rather than blindly following someone else’s “top 10” list.
All supplements referenced are available from the Welzo anti-aging and longevity collection.
The hallmarks of ageing: what longevity supplements actually target
In 2013, a landmark paper in the journal Cell defined the “hallmarks of ageing” — the distinct biological processes that collectively drive cellular and organismal decline. This framework, updated in subsequent years, remains the foundation of modern longevity science.
The hallmarks most relevant to supplementation include:
| Hallmark of Ageing | What Happens | Supplement Target |
|---|---|---|
| NAD+ depletion | Cellular energy molecule declines ~50% by age 50 | NMN, NADH |
| Deregulated nutrient sensing | Sirtuins and metabolic pathways become dysregulated | Resveratrol |
| Cellular senescence | “Zombie cells” accumulate and cause inflammation | Senolytics (quercetin, modified citrus pectin) |
| Altered microbiome | Gut bacteria balance shifts unfavourably | Akkermansia |
| Loss of structural proteins | Collagen and elastin production decline | Collagen peptides |
| Chronic stress load | Cortisol dysregulation accelerates cellular ageing | Adaptogens (ashwagandha) |
The honest framing. No supplement reverses ageing. What the best longevity supplements do is support specific cellular mechanisms with compounds backed by research — though much of that research remains at the animal-study stage, with human evidence still developing for many compounds. Longevity supplements are most effective as one component of a comprehensive approach that prioritises the genuinely proven interventions: exercise, sleep, nutrition, and stress management.
If you have a chronic condition, take medication, or are pregnant or breastfeeding, consult your GP before starting any supplement.
Mechanism 1: Restoring NAD+ (the energy and repair molecule)
The science
NAD+ (nicotinamide adenine dinucleotide) is arguably the single most important molecule in longevity science. It powers cellular energy production, enables DNA repair, and fuels the sirtuin “longevity genes.” The problem: NAD+ levels decline dramatically with age — by some estimates, halving between youth and age 50.
This NAD+ decline is linked to reduced cellular energy, impaired DNA repair, mitochondrial dysfunction, and increased inflammation. Restoring NAD+ is therefore the single most-studied strategy in longevity supplementation.
There are two main supplemental approaches to NAD+:
- NAD+ precursors (NMN) — compounds the body converts into NAD+
- NADH — the reduced, active form of NAD+ that participates directly in energy production
Best supplement: Welzo NMN Pro 1000
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The Welzo Ultra Purity NMN Pro 1000 at £24.99 (RRP £39.99) is the standout NAD+ supplement.
NMN (nicotinamide mononucleotide) is the most direct precursor to NAD+ — your cells convert it almost immediately. The Welzo formulation delivers a high 1000mg dose at Ultra Purity standards, at a price point (£24.99) that undercuts comparable premium NMN products costing £40-70+.
Why NMN over other NAD+ precursors: NMN is one biochemical step closer to NAD+ than alternatives like nicotinamide riboside (NR). Professor David Sinclair, the Harvard geneticist whose work popularised NAD+ science, has stated he considers NMN superior for this directness.
Key facts:
- 1000mg high dose per serving
- Most direct NAD+ precursor
- Ultra Purity manufacturing
- £24.99 — exceptional value
Premium alternative: Jarrow Formulas NMN 125mg
For users who prefer a recognised US specialist supplement brand, the Jarrow Formulas Nicotinamide Mononucleotide (NMN) 125mg at £66.73 is a well-regarded option. Jarrow has a strong reputation for quality manufacturing, though at a lower per-dose level (125mg) and substantially higher price than the Welzo option.
The NADH angle: NOW Foods NADH 10mg
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A different approach to NAD+ comes from supplementing NADH directly — the active, reduced form. The NOW Foods NADH 10mg at £39.34 (RRP £45.45) provides NADH for users who want the ready-to-use form rather than a precursor. NADH participates directly in cellular energy production and is sometimes preferred by users focused on energy and cognitive support.
Mechanism 1 verdict: Start with Welzo NMN Pro 1000 — high dose, most direct precursor, best value. Consider NADH as a complementary energy-focused addition.
Mechanism 2: Activating sirtuins (the longevity genes)
The science
Sirtuins are a family of seven proteins (SIRT1-7) often called the “longevity genes.” They regulate cellular health, DNA repair, inflammation, and metabolism — but they require NAD+ as fuel. This is the elegant connection in longevity science: NAD+ powers sirtuins, and certain compounds activate them.
The most famous sirtuin activator is resveratrol — the polyphenol in red wine and grape skins. The NAD+/sirtuin relationship is why NMN and resveratrol are the foundational pairing in longevity supplementation: NMN provides the fuel, resveratrol flips the switch.
Best supplement: Welzo Trans-Resveratrol
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The Welzo Ultra Purity Trans-Resveratrol at £21.99 (RRP £34.99) is our top sirtuin activator.
Critically, this is trans-resveratrol — the bioactive isomer (distinct from the less-active cis form). Not all resveratrol supplements specify the active isomer, so this matters. Paired with NMN, it completes the foundational NAD+/sirtuin protocol.
Key facts:
- Trans-resveratrol (bioactive form)
- Activates SIRT1 and related sirtuins
- Synergistic with NMN
- £21.99 — exceptional value
Premium alternative: NOW Foods Resveratrol Extra Strength 350mg
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The NOW Foods Resveratrol, Extra Strength 350mg at £23.94 (RRP £30.95) offers a higher per-capsule dose from a respected US brand. NOW Foods is known for quality manufacturing and rigorous testing, making this a solid alternative for users wanting a recognised international brand at a higher dose point.
Mechanism 2 verdict: The Welzo Trans-Resveratrol is the best-value sirtuin activator and the natural partner to NMN. For higher single-capsule doses, the NOW Foods option is a strong alternative.
Mechanism 3: Clearing senescent cells (senolytics)
The science
As we age, cells accumulate that have stopped dividing but refuse to die — senescent cells, sometimes called “zombie cells.” These cells secrete inflammatory compounds (the “senescence-associated secretory phenotype” or SASP) that damage surrounding healthy tissue and drive age-related inflammation.
Senolytics are compounds that support the body’s clearance of these senescent cells. This is one of the most exciting frontiers in longevity science — animal studies have shown that clearing senescent cells can extend healthspan. Human research is earlier-stage but promising.
The most-studied senolytic compounds include quercetin, fisetin, and modified citrus pectin (which binds galectin-3, a protein implicated in cellular ageing and fibrosis).
Best supplement: Welzo Modified Citrus Pectin
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The Welzo Ultra Purity Modified Citrus Pectin Powder at £21.99 (RRP £39.99) targets cellular senescence through galectin-3 binding.
Modified citrus pectin (MCP) is pectin modified to be absorbable, studied for binding galectin-3 — a protein implicated in fibrosis, inflammation, and cellular ageing. It represents a senolytic-adjacent approach to cellular health, at a fraction of the cost of premium MCP brands.
Key facts:
- Modified citrus pectin (bioavailable)
- Galectin-3 binding mechanism
- Cellular health and fibrosis support
- £21.99 — exceptional value
Best quercetin senolytic: Swanson Resveratrol & Quercetin
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The Swanson Resveratrol & Quercetin at £12.32 (RRP £16.10) cleverly combines two longevity mechanisms in one affordable supplement.
Quercetin is the most-researched senolytic compound — notably, its most prominent study examined it in combination with other senolytics. This Swanson formulation pairs quercetin’s senolytic potential with resveratrol’s sirtuin activation, making it a dual-mechanism option at a remarkably accessible £12.32.
Mechanism 3 verdict: For galectin-3-targeted cellular support, the Welzo Modified Citrus Pectin is the best value. For quercetin-based senolytic support with bonus resveratrol, the Swanson combination is exceptional value.
Mechanism 4: Supporting the gut-longevity axis
The science
One of the most exciting recent developments in longevity science is the recognition that the gut microbiome plays a central role in healthy ageing. The composition of gut bacteria shifts with age, often unfavourably, affecting metabolism, inflammation, immune function, and even brain health.
Akkermansia muciniphila has emerged as a key player. This beneficial bacterium supports the gut barrier (the mucin layer), is associated with healthy metabolic markers, and tends to decline with age. Lower Akkermansia levels are associated with various metabolic concerns — making targeted supplementation an area of active research.
Best supplement: Welzo Akkermansia 60 Billion AFU
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The Welzo Akkermansia 60 Billion AFU at £21.99 (RRP £39.99) delivers high-potency Akkermansia at exceptional value.
At 60 billion AFU, this targets the gut-longevity axis directly — supporting gut barrier integrity and metabolic health. Comparable premium Akkermansia products cost three times as much.
Key facts:
- 60 billion AFU potency
- Gut barrier (mucin layer) support
- Metabolic health association
- £21.99 — exceptional value vs premium alternatives
Premium clinical-grade option: Pendulum Akkermansia
For users specifically wanting the brand that pioneered commercial Akkermansia production, the Pendulum Akkermansia at £68.99 (RRP £89.99) is the most clinically-recognised option. Pendulum has significant brand authority in the gut-longevity space, though at roughly three times the price of the Welzo alternative.
Mechanism 4 verdict: The Welzo Akkermansia delivers the gut-longevity benefit at outstanding value. The Pendulum option suits those prioritising brand pedigree.
Mechanism 5: Preserving structural integrity (collagen)
The science
While NAD+, sirtuins, and senolytics target cellular mechanisms, ageing also has a visible, structural dimension. Collagen — the most abundant protein in the body — provides structure to skin, joints, bones, and connective tissue. Collagen production declines with age, contributing to skin wrinkling, reduced elasticity, and joint stiffness.
Importantly, collagen is among the better-supported supplements in human research — studies show collagen peptide supplementation can improve skin hydration, elasticity, and joint comfort. Unlike some cellular longevity compounds where evidence is animal-based, collagen has reasonable direct human evidence.
Best supplement: Welzo Bovine Collagen Peptides
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The Welzo Ultra Purity Pure Bovine Collagen Peptides Powder at £21.99 (RRP £29.99) addresses the structural dimension of ageing.
Hydrolysed collagen peptides are highly bioavailable, supporting skin hydration and elasticity alongside joint and connective tissue health. The versatile powder format mixes easily into coffee, smoothies, or water.
Key facts:
- Pure bovine collagen peptides (hydrolysed)
- Skin hydration, elasticity, appearance
- Joint and connective tissue support
- Reasonable human evidence base
- £21.99 — exceptional value
Mechanism 5 verdict: Collagen is one of the most evidence-backed supplements for visible ageing. The Welzo Collagen Peptides deliver this at excellent value.
Mechanism 6: Managing the stress-hormone axis
The science
Chronic stress is a genuinely underappreciated accelerator of ageing. Sustained cortisol elevation drives cellular damage, impairs sleep (itself a major longevity factor), accelerates cognitive decline, and disrupts metabolic health. Additionally, age-related hormonal decline — particularly testosterone in men — affects energy, muscle mass, and overall vitality.
Addressing the stress-hormone axis is therefore a legitimate longevity strategy, complementing the cellular mechanisms.
Best stress adaptogen: Welzo Ashwagandha
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The Welzo Ashwagandha at £19.99 is among the best-researched adaptogens, with human studies supporting reductions in cortisol and perceived stress.
By addressing chronic stress, ashwagandha supports the sleep, recovery, and stress resilience that underpin healthy ageing — complementing the cellular longevity compounds.
Best hormonal support (men): Welzo TestoMax
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For men addressing age-related hormonal decline, the Welzo Ultra Purity TestoMax at £24.99 (RRP £29.99) provides maximum-strength natural testosterone support. Testosterone declines roughly 1% per year after age 30, affecting energy, muscle, and vitality.
If you suspect significant deficiency, consider a testosterone blood test and consult your GP first.
Mechanism 6 verdict: Welzo Ashwagandha for stress-axis support; Welzo TestoMax for age-related hormonal support in men.
The complete longevity supplement comparison
| Supplement | Mechanism Targeted | Evidence Level | Price |
|---|---|---|---|
| Welzo NMN Pro 1000 | NAD+ restoration | Strong (developing in humans) | £24.99 |
| Welzo Trans-Resveratrol | Sirtuin activation | Moderate | £21.99 |
| Welzo Modified Citrus Pectin | Senolytic / galectin-3 | Developing | £21.99 |
| Welzo Akkermansia | Gut-longevity axis | Developing | £21.99 |
| Welzo Collagen Peptides | Structural protein | Reasonable (human) | £21.99 |
| Welzo Ashwagandha | Stress-hormone axis | Reasonable (human) | £19.99 |
| Welzo TestoMax | Hormonal support | Moderate | £24.99 |
| NOW Foods Resveratrol 350mg | Sirtuin activation | Moderate | £23.94 |
| Swanson Resveratrol & Quercetin | Sirtuin + senolytic | Moderate/developing | £12.32 |
| Jarrow Formulas NMN 125mg | NAD+ restoration | Strong (developing) | £66.73 |
| NOW Foods NADH 10mg | NAD+ (active form) | Moderate | £39.34 |
| Pendulum Akkermansia | Gut-longevity axis | Developing | £68.99 |
Building your longevity protocol by life stage
Rather than a one-size-fits-all stack, longevity supplementation can be tailored to life stage.
In your 30s: establish the foundation
Your NAD+ levels are beginning their gradual decline, and prevention is more effective than restoration. Focus on the foundational pathway:
- Welzo NMN Pro 1000 — begin NAD+ support early
- Welzo Trans-Resveratrol — sirtuin activation
- Welzo Ashwagandha — manage the stress that accelerates ageing during peak career years
In your 40s-50s: broaden the approach
NAD+ decline accelerates, structural changes become visible, and cellular senescence increases:
- Continue the NAD+/sirtuin foundation
- Add Welzo Collagen Peptides for emerging structural changes
- Add Welzo Akkermansia for the gut-longevity axis
- Men: consider Welzo TestoMax for age-related hormonal decline
In your 60s and beyond: comprehensive support
All mechanisms are now relevant; senescent cell burden is higher:
- Maintain the full foundation
- Add Welzo Modified Citrus Pectin for senolytic-adjacent cellular support
- Prioritise bioavailable forms for optimal absorption
- Combine with regular biomarker testing to track and adjust
The bioavailability question: why form matters
A supplement is only as good as the amount your body actually absorbs. This is particularly important for longevity compounds, several of which have absorption challenges.
Resveratrol: the bioavailability problem
Resveratrol’s biggest weakness is poor bioavailability — it degrades readily in the digestive tract. Strategies to improve absorption include:
- Taking with fat — resveratrol is fat-soluble, so taking it with a meal containing fat improves absorption
- Micronisation — reducing particle size increases surface area for absorption
- Trans-resveratrol form — the bioactive isomer (as in the Welzo Trans-Resveratrol)
NMN: stability and timing
NMN is more stable than resveratrol but benefits from:
- Morning dosing — aligns with the body’s circadian NAD+ rhythm
- Empty stomach — some evidence suggests better absorption
- High-quality sourcing — the NMN market has had purity issues, making Ultra Purity grades like Welzo NMN Pro 1000 valuable
Collagen: hydrolysed form
Collagen peptides should be hydrolysed (broken into smaller peptides) for absorption — as in the Welzo Collagen Peptides. Intact collagen is poorly absorbed.
Measuring what matters: longevity biomarkers
The most sophisticated approach to longevity supplementation is measuring your biomarkers — establishing a baseline, then tracking changes over time. This transforms supplementation from guesswork into a data-driven process.
Consider these tests from the Welzo anti-aging and longevity collection:
- Welzo Well Human Advanced Blood Test — comprehensive longevity-focused panel
- Full Body MOT Health Check — broad baseline screening
- Heart Disease Risk Blood Test — cardiovascular ageing markers
- Cholesterol Blood Test — lipid health
- HbA1c Blood Test — metabolic ageing
- Vitamin D Blood Test — affects numerous ageing pathways
- Testosterone Blood Test — hormonal status (men)
- Thyroid Blood Test — metabolic regulation
The protocol: test at baseline, begin your supplement regimen, then re-test after 3-6 months to measure changes objectively.
Safety and contraindications
General safety
The longevity supplements in this guide have generally good safety profiles at recommended doses. Mild digestive symptoms when starting are the most common side effect, usually resolving with continued use or taking with food.
Who should consult a doctor before starting
- Pregnant or breastfeeding women — most longevity supplements lack pregnancy safety data
- People with chronic conditions — particularly liver, kidney, or cardiovascular disease
- Those on prescription medications — resveratrol may interact with blood thinners; other interactions are possible
- People scheduled for surgery — some supplements affect bleeding; stop 2 weeks before
- Those with hormone-sensitive conditions — relevant for testosterone support and some polyphenols
Specific considerations
- Resveratrol has mild blood-thinning potential — relevant with anticoagulants
- NMN is generally well-tolerated; long-term human safety data is still developing
- Quercetin may interact with certain medications (some antibiotics, blood thinners)
- Testosterone support is inappropriate for those with prostate concerns without medical guidance
- Probiotics (Akkermansia) — introduce slowly if you have a sensitive digestive system
Always consult your GP before starting any new supplement regimen if you have health concerns or take medication.
Frequently asked questions
What are the best longevity supplements in 2026?
The best longevity supplements target specific ageing mechanisms. The foundational pairing is Welzo NMN Pro 1000 (£24.99) for NAD+ restoration and Welzo Trans-Resveratrol (£21.99) for sirtuin activation. Beyond this foundation, the best supplement depends on which ageing mechanisms you’re targeting — gut (Akkermansia), structural (collagen), senescence (modified citrus pectin), or stress (ashwagandha).
Do longevity supplements actually extend lifespan?
No supplement has been proven to extend human lifespan. What the best longevity supplements do is support specific cellular mechanisms involved in ageing — with the strongest evidence from animal studies and developing human research. They’re best understood as supporting healthy ageing (healthspan) rather than extending maximum lifespan. The genuinely proven longevity interventions remain exercise, sleep, nutrition, and not smoking.
What is the most important longevity supplement to start with?
NMN is the most evidence-backed starting point — it’s the most direct precursor to NAD+, the central molecule in cellular ageing. The Welzo NMN Pro 1000 provides a high 1000mg dose at exceptional value. For best results, pair it with resveratrol for the complete NAD+/sirtuin approach.
What’s the difference between NMN, NR, and NADH?
All three relate to NAD+ but differently. NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside) are precursors the body converts into NAD+ — NMN is one step more direct. NADH is the reduced, active form of NAD+ that participates directly in cellular energy production. NMN is the most popular longevity choice; NADH appeals to those focused on energy and cognitive support.
Should I take NMN and resveratrol together?
Yes — they work synergistically. NMN provides the NAD+ that fuels sirtuins (“longevity genes”), while resveratrol activates those sirtuins. Together they target the longevity pathway from complementary angles. This is the foundational pairing in longevity supplementation. Take resveratrol with a source of fat for better absorption.
What are senolytics and do they work?
Senolytics support the clearance of senescent cells — “zombie cells” that accumulate with age and release inflammatory compounds. Quercetin, fisetin, and modified citrus pectin are studied for senolytic properties. Animal studies are promising; human research is earlier-stage. The Welzo Modified Citrus Pectin and Swanson Resveratrol & Quercetin offer senolytic-adjacent support.
How does the gut microbiome affect ageing?
The gut microbiome plays a significant role in healthy ageing — affecting metabolism, inflammation, immunity, and even brain health. Beneficial bacteria like Akkermansia muciniphila support the gut barrier and metabolic health but decline with age. Supplementing with Welzo Akkermansia targets this gut-longevity axis.
When is the best time to take longevity supplements?
Timing varies by supplement. NMN is best in the morning on an empty stomach (aligning with circadian NAD+ rhythm). Resveratrol is best with a fat-containing meal. Collagen can be taken any time. Ashwagandha is often preferred in the evening for stress and sleep benefits. Akkermansia is typically taken with food.
How long until longevity supplements show results?
Longevity supplements work gradually through cumulative cellular effects. Some users notice energy improvements within weeks (particularly NMN), while structural benefits (collagen) typically appear after 4-8 weeks. The deeper cellular longevity benefits are long-term investments. Consistency over months and years matters most — and biomarker testing helps track objective changes.
Are longevity supplements safe to take long-term?
Most have good safety profiles at recommended doses, though long-term human safety data is still developing for newer compounds like NMN. Consult your GP if you have chronic conditions, take medications (especially blood thinners), are pregnant, or are scheduled for surgery. Resveratrol and quercetin can have mild blood-thinning effects.
Can I get longevity benefits from diet instead of supplements?
Diet and lifestyle are the foundation — supplements are the addition. Resveratrol occurs in red wine and grapes, NAD+ precursors in some foods, and collagen-supporting nutrients in a balanced diet. However, achieving the doses studied for longevity benefits through diet alone is difficult. The most effective approach combines a nutrient-dense diet, exercise, sleep, and stress management with targeted supplementation.
Where can I buy longevity supplements in the UK?
Browse the complete Welzo anti-aging and longevity collection, which includes NMN, resveratrol, Akkermansia, collagen, modified citrus pectin, and comprehensive longevity blood tests, all with UK shipping and support.
The bottom line
Longevity supplementation has matured into a mechanism-targeted discipline. Rather than chasing a single “miracle” supplement, the sophisticated approach is to understand the distinct mechanisms of ageing — NAD+ decline, sirtuin regulation, cellular senescence, gut health, structural decline, and stress load — and target the ones most relevant to your goals and life stage.
The foundational protocol that addresses the most-studied mechanisms:
- NAD+ restoration → Welzo NMN Pro 1000 (£24.99)
- Sirtuin activation → Welzo Trans-Resveratrol (£21.99)
- Gut-longevity → Welzo Akkermansia (£21.99)
- Structural support → Welzo Collagen Peptides (£21.99)
- Senolytic support → Welzo Modified Citrus Pectin (£21.99)
- Stress-hormone axis → Welzo Ashwagandha (£19.99)
For users wanting recognised international brands, the NOW Foods Resveratrol, Swanson Resveratrol & Quercetin, Jarrow Formulas NMN, NOW Foods NADH, and Pendulum Akkermansia provide premium alternatives.
Above all, remember the hierarchy: lifestyle first, supplements second. The genuinely proven longevity interventions — regular exercise, quality sleep, a nutrient-dense diet, stress management, and social connection — remain free and more impactful than any supplement. Longevity supplements are a valuable addition to these foundations, targeting cellular mechanisms that lifestyle alone may not fully address.
If you have any health concerns or take medications, please consult your GP before starting any supplement regimen.
Explore the complete range at the Welzo anti-aging and longevity collection.
About this guide
This guide has been compiled by the Harley Medic Editorial Team based on current longevity research and verified product information. It is for general information only and is not a substitute for personalised medical advice. Longevity supplements support healthy ageing but do not stop, reverse, or cure ageing or any disease. These statements have not been evaluated by regulatory agencies, and supplements are not intended to diagnose, treat, cure, or prevent any disease.
Pregnant or breastfeeding women, people with chronic medical conditions, those taking prescription medications, and anyone scheduled for surgery should consult their GP before starting any new supplement.
We have no commercial affiliation with any of the brands reviewed beyond linking to verified retail sources. All pricing was accurate at time of writing (November 2026); please verify current pricing at the linked retailer.
References
- López-Otín C, Blasco MA, Partridge L, et al. The Hallmarks of Aging. Cell. 2013;153(6):1194-1217.
- Rajman L, Chwalek K, Sinclair DA. Therapeutic Potential of NAD-Boosting Molecules: The In Vivo Evidence. Cell Metab. 2018;27(3):529-547.
- Bonkowski MS, Sinclair DA. Slowing ageing by design: the rise of NAD+ and sirtuin-activating compounds. Nat Rev Mol Cell Biol. 2016;17(11):679-690.
- Zhu Y, Tchkonia T, Pirtskhalava T, et al. The Achilles’ heel of senescent cells: from transcriptome to senolytic drugs. Aging Cell. 2015;14(4):644-658.
- Cani PD, de Vos WM. Next-Generation Beneficial Microbes: The Case of Akkermansia muciniphila. Front Microbiol. 2017;8:1765.
