Welzo Ultra Purity Spermidine 10mg
High-strength, third-party tested spermidine capsule. 10mg per serving, sold on Amazon.
Review Price →Supplement Guides
Evidence-led guides to the most-discussed longevity supplements locally.
What is Supplement Guides?
This LongevityTortoise guide reviews the latest peer-reviewed evidence to help you understand Supplement Guides and decide whether it fits into a healthy-ageing routine. We prioritise human trials, disclose limitations and never replace professional medical advice.
About this hub: We do not rank supplements as "best." Instead, each guide explains the mechanism, summarises human trials, notes side effects, and gives practical information. Most pages include affiliate links where relevant; those links do not influence our editorial content. Read the full affiliate disclosure.
⚠️ Important: No supplement has been proven to extend human lifespan. Always consult a qualified healthcare professional before starting any supplement, especially if you are pregnant, nursing, taking medication or have a medical condition.
Product Information Pages
Evidence-led product picks we have reviewed independently. Each link is an affiliate link; read our disclosure.
Welzo NMNH Advanced NAD+ Formula 500mg
Reduced-form NAD+ precursor with 500mg NMNH per serving. delivery via Amazon.
Review Price →Qualia NAD+ Supplement
Clinically studied NAD+ booster with three B3 precursors, resveratrol evidence, B-complex and marine magnesium glycinate guide.
Review Price →6-in-1 NMNH NAD+ Precursor Trans-Resveratrol Blend
Multi-ingredient longevity stack with NMNH, resveratrol, urolithin A, quercetin and CoQ10 for heart health.
Review Price →Welzo Bovine Collagen Peptides Powder 400g
5,000mg Type I III hydrolysed collagen peptides guide per serving. Grass-fed, 80 servings, unflavoured.
Review Price →CoQ10 Supplement High Strength 500mg
120 vegan capsules, naturally fermented ubiquinone, 4-month supply, made locally.
Review Price →Pureclinica Fermented CoQ10 300mg
90 tablets, non-GMO USP grade, added vitamin C and black pepper extract, 3-month supply.
Review Price →Magnesium Glycinate Gummies 6000mg
120 sugar-free raspberry gummies with vitamin D, B6, calcium, potassium and CoQ10. 60-day supply.
Review Price →Organic Turmeric 1380mg + Black Pepper + Ginger
EU Organic certified turmeric curcumin evidence with piperine and ginger for absorption and joint comfort.
Review Price →Pure Marine Collagen Capsules 1200mg
1200mg Type I III hydrolysed fish collagen per serving. 120 capsules, no magnesium stearate.
Review Price →Multi Collagen 1650mg Type I, II, III, V, X
Five collagen types from bovine and marine sources plus vitamin C. 180 capsules, 3-month supply.
Review Price →Primabiotic Hyaluron 250mg Liquid Shots
30 daily 30ml shots, 250mg hyaluronic acid per shot. Vegan, gluten-free, lactose-free — pairs with collagen.
Review Price →Fisetin 500mg UK Supplement
High-purity fisetin capsule. Evidence-led buying guide for senolytic and anti-aging use.
Review & Price →Urolithin A 500mg UK Supplement
Pure Urolithin A for mitochondrial renewal. Matches doses used in human trials.
Review & Price →C15:0 Pentadecanoic Acid UK Supplement
Pure pentadecanoic acid for metabolic and membrane health. Early but interesting evidence.
Review & Price →NMN / NAD+ Booster UK Buying Guide
Compare NMN, NR, NMNH and choose a quality NAD+ precursor supplement.
Review & Price →Resveratrol / Pterostilbene UK Supplement
Trans-resveratrol and pterostilbene products with realistic evidence expectations.
Review & Price →Spermidine 10mg UK Supplement
Wheat-germ-derived spermidine for autophagy support. 10mg per serving.
Review & Price →Taurine UK Supplement
Free taurine powder or capsules. 500mg–3g/day, safe and cheap.
Review & Price →Glycine UK Supplement
Pure glycine or collagen peptides for sleep, collagen synthesis and methionine balance.
Review & Price →Calcium Alpha-Ketoglutarate (Ca-AKG) UK
The AKG form with mouse lifespan data. Buying guide and dose guidance.
Review & Price →Rapamycin for Longevity UK
Prescription-only mTOR inhibitor. Why it is not a supplement and what the PEARL trial found.
Read Guide →🐢 Tortoise Spotlight
Our mascot isn't just a logo — tortoises are real-world longevity champions. Click any photo to learn more about the species on Wikipedia.
Ingredient Guides
Best Longevity Supplements UK 2026: Evidence-Based Rankings
Our ranked guide to the most-discussed longevity supplements by evidence strength, not marketing hype.
Read Ranking →Calcium Alpha-Ketoglutarate (Ca-AKG) for Longevity
Mouse lifespan data, human biomarker trials, dose and the limits of current evidence.
Read Evidence →Glucosamine Sulfate for Joints and Healthy Ageing
Osteoarthritis evidence, the Biobank mortality signal and important caveats.
Read Evidence →L-Theanine for Sleep, Calm and Focus
Stress, sleep quality and caffeine pairing: what human trials say.
Read Evidence →Rhodiola Rosea for Fatigue and Stress
Human trials in shift workers and fatigued adults, dose and standardisation.
Read Evidence →Vitamin C for Collagen, Immunity and Healthy Ageing
Collagen synthesis, immune function, antioxidant role and dose guidance.
Read Evidence →Ginger for Inflammation, Digestion and Joints
Osteoarthritis pain, inflammatory markers and digestive comfort evidence.
Read Evidence →Micro-Dosed Lithium for Brain Health and Longevity
Trace-lithium epidemiology, dementia hypotheses and critical safety caveats.
Read Evidence →Magnesium Malate for Energy and Fibromyalgia
Form comparison, Krebs-cycle rationale, fibromyalgia evidence and study doses.
Read Evidence →Fisetin as a Senolytic: Evidence and Safety Guide
Mayo Clinic trials, mouse longevity data and the gap between promise and proof.
Read Evidence →NMN & NAD+ Precursors: What the 2026 Evidence Actually Says
Human trials, safety, study doses and the difference between NMN and NR.
Read Evidence →NAD+ Precursors Compared: NR vs NMN for Longevity
Side-by-side comparison of bioavailability, trials, safety and buying advice.
Read Evidence →Resveratrol vs Pterostilbene: Evidence, Study Doses & Availability 2026
Bioavailability, human trials, study doses and how these stilbenes differ.
Read Evidence →Spermidine: Food Sources, Supplements and Autophagy Evidence
Spermidine-rich foods, wheat-germ extract and the latest autophagy trials.
Read Evidence →Spermidine & Autophagy: Oxford Vaccine Trial in Older Adults
Can a wheat-germ compound reboot cellular recycling and immune response?
Read Evidence →Quercetin & Fisetin as Senolytics: What Human Trials Say
Clearing senescent cells: dasatinib + quercetin, fisetin and the safety caveats.
Read Evidence →Omega-3 and Longevity: DHA, EPA, Inflammation and Heart Health
What REDUCE-IT, STRENGTH and meta-analyses say about fish oil and healthy ageing.
Read Evidence →Vitamin D3 + K2 for Healthy Ageing locally: Evidence & Study Context
national health guidelines guidance, bioavailability, K2's calcium-directing role and study context.
Read Evidence →Magnesium for Sleep and Muscle Health in Ageing: Evidence
Forms, study doses, deficiency risk and what trials say about cramps and insomnia.
Read Evidence →Glycine and Collagen for Healthy Ageing: Evidence and Study Doses
Collagen peptides for skin and joints, plus glycine's emerging role in ageing.
Read Evidence →Metformin for Longevity: TAME Trial, Current Status and Risks
Why the world's most famous anti-ageing drug candidate is still unproven in healthy adults.
Read Evidence →Rapamycin for Longevity: PEARL Trial 2025 Results Explained
One year of low-dose rapamycin in healthy adults — safety, healthspan signals and risks.
Read Evidence →Pterostilbene Supplements 2026: Evidence, Dose Safety
The blueberry-derived stilbene with better bioavailability than resveratrol: evidence, dose and safety caveats.
Read Evidence →Glycine Supplements 2026: Sleep, Collagen Longevity Evidence
The simplest amino acid: sleep trials, collagen support, methionine balance and study-dose context.
Read Evidence →Fisetin as a Senolytic: Evidence and Safety Guide
Mayo Clinic trials, mouse longevity data and the gap between promise and proof.
Read Evidence →Fisetin for Anti-Aging: Brain, Heart, Skin and Metabolic Benefits
Beyond senolytics — what published science says about fisetin and healthy ageing.
Read Evidence →Urolithin A and C15:0: Mitochondrial Renewal for Healthy Ageing
Two next-generation molecules that target the energy factories inside your cells.
Read Evidence →NAD+ Boosters Compared: NMN vs NR vs NAM for Longevity 2026
Which NAD+ precursor has the best evidence, safety and value in the UK?
Read Evidence →Spermidine and Autophagy for Longevity: 2026 Evidence Update
What wheat-germ extract, vaccine trials and food sources tell us about spermidine.
Read Evidence →Taurine Supplements for Ageing and Muscle: UK Evidence 2026
Beyond the 2023 Science paper — what taurine may do for older adults.
Read Evidence →Longevity Blood Tests UK 2026: What to Measure and Why
A practical guide to biomarkers that track biological ageing and metabolic health.
Read Evidence →Rapamycin, mTOR and Longevity: Benefits, Risks and Dosing 2026
Why rapamycin is the most discussed prescription anti-ageing drug.
Read Evidence →ITP Longevity Breakthroughs: 2BAct, Halofuginone and DCA
What the gold-standard Interventions Testing Program found in its 2021 cohort.
Read Evidence →Next-Generation Senolytics: Targeted Zombie-Cell Killers Beyond Fisetin
How biotech is engineering more precise ways to clear senescent cells.
Read Evidence →SGLT2 Inhibitors vs Metformin: Are Diabetes Drugs the Next Anti-Aging Pills?
What mouse lifespan data and human trials say about two metabolic drugs.
Read Evidence →Epigenetic Reprogramming and ER-100: Can Yamanaka Factors Reverse Ageing?
The first human trial of cellular rejuvenation is now underway.
Read Evidence →Beyond Supplements: Therapies, Diets and Longevity Tools
Pills are only one part of the healthy-ageing puzzle. These evidence-based guides cover non-supplement approaches.
Red Light Therapy for Longevity UK 2026
Photobiomodulation, mitochondrial health and UK device options with affiliate picks.
Read Guide →Light Therapy Types for Longevity UK 2026
Red/NIR, blue, bright light, sound therapy and low-intensity ultrasound for healthy ageing.
Read Guide →Anti-Ageing Diets: High-Fat, Low-Fat, High-Carb, Atkins, Keto, Fasting & More 2026
13 dietary approaches compared using published human trials and population studies.
Read Guide →Longevity Blood Tests UK 2026
A practical guide to biomarkers that track biological ageing and metabolic health.
Read Guide →Evidence Strength Comparison
Evidence Strength at a Glance
We rate supplements by the volume and quality of human evidence behind their main longevity or healthy-ageing claim, not by popularity. "Very large" means multiple RCTs and meta-analyses; "small" means pilot trials or preclinical work.
NMN
Human trial volume: NAD+ elevation; metabolic markers
Key claimed benefit: Food supplement
NR
Human trial volume: NAD+ elevation; some vascular markers
Key claimed benefit: Food supplement
Resveratrol / Pterostilbene
Human trial volume: Vascular, metabolic, sirtuin signalling
Key claimed benefit: Food supplement
Spermidine
Human trial volume: Autophagy, immune response
Key claimed benefit: Food / wheat-germ extract
Fisetin / Quercetin
Human trial volume: Senescent-cell clearance
Key claimed benefit: Food supplement
Omega-3 (EPA/DHA)
Human trial volume: Cardiovascular, triglycerides, anti-inflammatory
Key claimed benefit: Food supplement / prescription
Vitamin D3 + K2
Human trial volume: Bone, muscle, immune
Key claimed benefit: Food supplement
Magnesium
Human trial volume: Sleep, muscle relaxation, bone
Key claimed benefit: Food supplement
Collagen / Glycine
Human trial volume: Skin, joints, connective tissue
Key claimed benefit: Food supplement
Buying Checklist
- Check the active amount. A "1,000 mg fish oil" capsule may contain only 300 mg EPA/DHA; a "collagen" label may not state peptide type.
- Demand third-party testing. compare certificates of analysis (COA), ISO/IEC 17025-accredited labs, or Informed Sport / NSF certification where relevant.
- Prefer registered sellers. Returns, refunds and consumer rights are easier with a company.
- Avoid disease-treatment claims. Food supplements cannot legally claim to treat, cure or prevent disease.
- Track your response. More is rarely better, and the highest marketed doses often exceed trial doses.
- Check interactions. Vitamin K2 interacts with warfarin; omega-3 can affect bleeding risk; magnesium needs caution in kidney disease.
Foundational Health First
Before adding any supplement, the strongest evidence for healthy ageing still supports:
- Regular physical activity, including resistance training.
- Sufficient, consistent sleep.
- A diet rich in vegetables, legumes, whole grains, oily fish and fermented foods.
- Social connection and cognitive engagement.
- Not smoking and limiting alcohol.
Read our introduction to what longevity science actually means for context on lifespan vs healthspan.
Frequently Asked Questions
What is Supplement Guides?
Supplement Guides is an evidence-based LongevityTortoise resource for readers interested in healthy ageing. Independent research summaries; consult a healthcare professional before changing supplements or health regimen.
Is the information on this page medical advice?
No. Independent research summaries; consult a healthcare professional before changing supplements or health regimen.
How does LongevityTortoise choose topics?
We focus on peer-reviewed papers, human trials, preprints and regulatory updates relevant to UK readers. We disclose affiliate links and conflicts of interest.
Are supplements recommended on this page?
We review supplements as informational products only. They are not personal recommendations. Always check with a qualified healthcare professional before starting a supplement.
Where can I find related LongevityTortoise articles?
Use the related-links section near the bottom of the page, the site navigation or our sitemap.
Last updated: 2026-09-06 by LongevityTortoise.