Dr Fiona Nwachuku
VerifiedMBBS · BSLM · MIFM · London SW1
Metabolic health
Mitochondrial therapy
Epigenetics
Next consult Tue 23 Apr
The UK's independent directory of credential-verified longevity clinicians. Every compound profile traceable to peer-reviewed research. No marketing claims. No supplement sales. Just the evidence — and the people qualified to interpret it.
MBBS · BSLM · MIFM · London SW1
Accredited by
BSLM
British Society of Lifestyle Medicine
Credential checks
GMC
General Medical Council register
01 · Practitioners
Every listed practitioner has been credential-checked against their registering body — GMC, BSLM, IFM, BACP, or equivalent. Filters narrow by specialism, location, and availability.
MBBS · BSLM · Hormone therapy
Specialises in bioidentical hormone therapy, thyroid optimisation, and adrenal recovery. Trained at UCL and spent a decade in NHS endocrinology before moving into integrative practice. Works with both male and female patients on hormonal root causes of fatigue, cognitive decline, and metabolic slowdown.
MBChB · IFM · Functional med.
A founding member of the IFM UK chapter, Dr Mendoza has spent 12 years applying systems biology to autoimmune and gastrointestinal conditions. Her protocols integrate advanced microbiome sequencing, mitochondrial function testing, and precision elimination approaches grounded in published functional medicine literature.
BMedSci · BSLM · Metabolic
Dr Tallis leads a metabolic reversal clinic in North London and has published on CGM as a decision-support tool in clinical practice. His work focuses on the evidence-based reversal of insulin resistance, dyslipidaemia, and type 2 diabetes — using lifestyle medicine alongside targeted, personalised intervention. Trained at King's College London.
MBBS · MIFM · Cognitive health
One of the UK's few clinicians with dual training in neurology and functional medicine. Dr Kaur's practice centres on the relationship between neuroinflammation, sleep architecture, and cognitive reserve — drawing on Walker, Bredesen, and Huberman's research to build evidence-grounded protocols for her patients in Edinburgh and online.
MB BCh · BSLM · Cardiometabolic
Board-certified in preventive medicine and lifestyle medicine, Dr O'Reilly follows the Attia-informed model: aggressive early biomarker tracking of ApoB, Lp(a), and CIMT, with cardiorespiratory fitness as the primary health metric. Works with patients in Bristol and remotely on risk reduction decades before disease onset.
MBChB · IFM · Longevity med.
One of the UK's few clinicians integrating cellular senescence research into routine clinical practice. Dr Pienaar trained in Cape Town and London, completed IFM certification in 2019, and works with TruAge epigenetic testing and Horvath clock analysis to build evidence-informed protocols where individual risk profiles support it.
02 · Supplements
Every compound profile is built from peer-reviewed research and labelled by evidence tier. We do not sell supplements. We cite the studies, describe the doses used in trials, and link you to practitioners who work with each compound.
Roadmap: 50 evidence-graded compound profiles in build. Three live below — full hub launching with founding practitioner cohort.
A direct precursor to NAD+, a coenzyme central to cellular energy production and DNA repair. Mechanistic data is strong; long-duration human trials testing clinical outcomes are still accumulating. This is the compound everyone is selling — we're the ones asking whether the evidence supports the price tag.
NMN is converted to NAD+ in human tissue following oral supplementation — a pathway confirmed across multiple bioavailability studies. Twelve human RCTs have assessed effects including NAD+ blood levels, insulin sensitivity, muscle function, and endurance. Most trials ran 8–16 weeks, which is insufficient to assess long-duration clinical outcomes. The evidence supports the mechanism; it does not yet support most of the marketing claims.
Postbiotic that induces mitophagy. Associated in randomised trials with improvements in muscle function and immune cell health.
Urolithin A is a postbiotic metabolite produced from pomegranate ellagitannins by gut bacteria. Six randomised controlled trials — including landmark work from Amazentis/EPFL — have measured mitophagy markers, muscle endurance, and immune cell function in human participants. Effects are more pronounced in older adults and in individuals with low UA production capacity. This is the strongest human RCT evidence base in the mitophagy-targeting category.
Polyamine linked to autophagy induction in preclinical work. Observational signals for cardiovascular and cognitive endpoints; RCT evidence thinner.
Spermidine is a natural polyamine found in wheat germ, aged cheeses, soybeans, and mushrooms. Preclinical work consistently links it to autophagy induction via inhibition of EP300 acetyltransferase. Human evidence currently rests on observational studies correlating dietary spermidine intake with cardiovascular and cognitive outcomes. Randomised trial evidence is thinner than for NMN or Urolithin A — our full evidence profile is under editorial review pending source verification.
For practitioners
Listings open by application. We verify GMC registration (where applicable), professional body memberships (BSLM, IFM, A4M, LMI), and a documented longevity-medicine practice. Cosmetic-injectables-only practices are not listed. Re-verification cadence is published on our editorial standards page.
Founding cohort applications open through Q3 2026. Email practitioners@provenlongevity.co.uk with your GMC number (or equivalent), professional body affiliations, and a brief outline of your longevity-medicine practice. We respond within 5 working days.
03 · Research Hub
Every Evidence Profile summarises the primary human trial data, names the researchers, cites the journals, and is honest about what the evidence doesn't yet support. Medically reviewed by a BSLM-registered editor before publish.
A postbiotic that induces mitophagy — randomised trials demonstrate improvements in muscle function and immune cell health, with larger effects in untrained adults than athletes.
NAD+ precursor with strong mechanistic rationale and bioavailability data — but long-duration clinical outcome trials are still accumulating and US regulatory status remains unsettled.
Polyamine linked to autophagy induction — preclinical data is extensive, with human observational signals for cardiovascular and cognitive endpoints, but RCT evidence is thinner.