Guides
Ingredient guides & research.
In-depth guides on longevity supplement ingredients — the science, the published research and what to look for when buying. Written by a UK manufacturer that independently tests every batch.
Best longevity supplements UK
How to build an evidence-led longevity stack — the categories that matter and the top pick in each.
Read guide Buying GuideBest berberine UK
How to choose a berberine supplement — form, bioavailability, dose, testing and value.
Read guide Buying GuideBest AHCC UK
How to choose an AHCC supplement — standardisation, research-aligned dose and testing.
Read guide Metabolic GuideNatural alternatives to Ozempic?
Why no supplement equals a GLP-1 medication, and the genuine natural levers — honestly.
Read guide Science GuideThe hallmarks of ageing
The scientific framework behind why we age, explained clearly, and where ingredients fit.
Read guide ReferenceLongevity glossary
40+ longevity and supplement terms defined clearly — NAD+, sirtuins, autophagy and more.
Read guide AboutEditorial standards & team
How we research, write, review and update our guides.
Read guide AboutQuality, testing & sourcing
UK manufacturing, independent ISO/IEC 17025 batch testing and a COA on request.
Read guide Science GuideHow to increase NAD+ naturally
Diet, exercise, fasting and the lifestyle levers that support your body’s own NAD+ levels.
Read guide Safety GuideNMN side effects & safety
Is NMN safe? What the research says about tolerability, dosing and who should take care.
Read guide Protocol GuideWhen to take NMN
Morning vs evening, with or without food — how to time NMN for best results.
Read guide Ingredient GuideWhat is berberine?
The plant alkaloid behind “nature’s Ozempic” — how it works via AMPK and what it’s studied for.
Read guide Comparison GuideDihydroberberine vs berberine
Which form absorbs better, and which is right for you. A clear, honest comparison.
Read guide Ingredient GuideBerberine benefits
What the research actually supports for metabolism, blood sugar and more.
Read guide Protocol GuideBerberine dosage
How much berberine to take, when, and how to split doses for tolerability.
Read guide Ingredient GuideAHCC benefits
The mushroom-derived compound studied for immune support — what the evidence shows.
Read guide Protocol GuideAHCC dosage
How much AHCC to take and how to use it effectively.
Read guide Metabolic GuideNatural GLP-1 supplements
How GLP-1 works and the diet and ingredient levers that support your own response.
Read guide Metabolic GuideBerberine & GLP-1
Is berberine really “nature’s Ozempic”? An honest comparison.
Read guide Science GuideWhat is NAD+?
The coenzyme behind every longevity ingredient. What it is, why it declines with age, sirtuins and the precursor approach explained.
Read guide Ingredient GuideWhat is NMN?
Nicotinamide Mononucleotide explained — what it is, how it relates to NAD+, the published research and dosing protocols.
Read guide Comparison GuideNMN vs NMNH
What is the difference between NMN and NMNH? Structure, research base, dosing and how to choose between them.
Read guide Comparison GuideNMN vs NR
NMN and NR are both NAD+ precursors — but they are structurally distinct. Here is what the research shows and how to choose.
Read guide Combination GuideNMN & Resveratrol
Should you take NMN and resveratrol together? Trans-resveratrol vs resveratrol, the sirtuin research rationale and what to look for.
Read guide Dosage GuideNMN Dosage
How much NMN should you take? Published human clinical research doses from 250mg to 900mg per day — explained.
Read guideHow to Choose NMN
The 5 criteria every NMN supplement must meet. Green flags, red flags, purity explained, independent testing and what a CoA actually is.
Read guide Our ProcessScience & Testing
How Vitality Supplements formulates, manufactures and independently tests every product — ISO/IEC 17025 batch testing explained.
Read guide ResearchResearch References
Every study cited by Vitality Supplements — with links to source publications. Full transparency on the research behind our products.
View referencesThe Vitality Longevity Protocol
A five-pillar guide to longevity supplementation — covering the biology, the research and how to build a structured supplement approach.
All published guides
Every guide published by Vitality Supplements — ingredient science, buying guides, dosage, the Longevity Protocol and research references.
Longevity supplements UK — complete guide (2026) What is NAD+? Nicotinamide Adenine Dinucleotide explained What is NMN? Nicotinamide Mononucleotide explained NMN vs NMNH — what is the difference? NMN vs NR — what is the difference? NMN and Resveratrol — should you take them together? How to choose an NMN supplement in the UK (2026) NMN dosage guide — how much should you take? The Vitality Longevity Protocol — overview Pillar 1: NAD+ & Cellular Energy Pillar 2: Sirtuins & Gene Regulation Pillar 3: Mitochondrial Health Pillar 4: Cellular Stress & Inflammaging Pillar 5: The Supplement Protocol Our science & testing process Research references — all cited studies Frequently asked questionsReady to shop the range?
>99% β-NMN purity · ISO/IEC 17025 tested every batch · CoA on request · UK manufactured
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