Clinical Nutritionist · Functional Medicine · 10 Harley Street, London
Science-led nutrition for lasting change
Personalised programmes rooted in advanced testing and evidence-based medicine.
Olga Hamilton is a registered nutritional therapist and functional medicine practitioner specialising in gut health, SIBO & IMO, microbiome analysis, hormone health, and the skin-gut axis — building truly personalised clinical programmes from complex biodata.
MSc Nutritional Medicine · DipION PGDip Nutritional Medicine
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Registrations
mBANT · CNHC Registered Recognised by the Dept. of Health
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TEDx Speaker
"The Fast Way to Happy" Gut microbiome & mental health, 2019
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Clinic
10 Harley Street, London W1 Also available online worldwide
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Specialist areas
SIBO · IMO · Microbiome Hormones · Skin-Gut Axis
Who I Am
Nutrition is not one-size-fits-all
Olga Hamilton has been practising nutritional therapy since 2012, working with clients presenting some of the most complex chronic health challenges — from longstanding digestive dysfunction to hormone imbalance, skin conditions, and mental health through the gut-brain axis.
Her approach combines advanced functional testing with evidence-based clinical protocols, building programmes that are genuinely individualised to each person's biology, genetics, and lifestyle.
Advanced breath testing, stool microbiome analysis, and personalised antimicrobial and dietary protocols to address the root cause of digestive dysfunction.
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Gut Microbiome & Genetics
Microba stool analysis, LifeCodeGX DNA methylation and detoxification reports, GI-MAP, and organic acids for a complete biological picture.
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Hormone Health
DUTCH Complete testing for oestrogen metabolism, cortisol rhythm, and androgen balance — with protocols tailored to perimenopause, thyroid, and adrenal health.
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Skin & Gut Axis
Rosacea, eczema, urticaria, and acne explored through the lens of gut dysbiosis, intestinal permeability, and immune dysregulation.
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Weight Management
Metabolic Balance-trained programmes combining nutrigenetics, hormone testing, and personalised nutrition to achieve and sustain a healthy weight.
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Corporate Wellbeing
Engaging workplace wellness workshops and keynote talks delivered to organisations including Commerzbank, Macquarie, and Mizuho Bank.
Client Stories
What clients say
"Olga helped me heal my SIBO, migraines and rosacea. She navigated me through nutritional protocols with step-by-step guidance. The migraines and rosacea are gone."
— SIBO & Rosacea Client, London
"The treatment programme Olga designed has made a huge and lasting difference to my life. I'm enjoying food for the first time in many years — verified by a big reduction in my latest breath test."
— Long-term SIBO Client
"Thanks to Olga's diligence in checking everything, I was officially diagnosed with EPI. I'm really grateful — I don't know where I'd be otherwise."
— EPI Diagnosis Client, KD
"I've spent thousands with various therapists but never spoken to anyone who seemed to really understand what's going on. There's hope I'm not stuck like this forever."
— IBS Client, P.L.
Get Started
Ready to find your root cause?
Book a free 15-minute discovery call to discuss your health goals and find out how a personalised programme with Olga could help you.
Olga Hamilton is a registered nutritional therapist and functional medicine practitioner based at 10 Harley Street, London. With a degree from the Institute for Optimum Nutrition and a post-graduate diploma in Nutritional Medicine, she is one of a small number of practitioners in the UK able to analyse complex biological data and translate it into highly personalised clinical programmes.
She passionately believes in the power of nutrition to address every dimension of health — from longstanding digestive dysfunction and gut dysbiosis, to hormone imbalance, skin conditions, weight management, and mental wellbeing through the gut-brain axis.
In 2019, Olga delivered a TEDx talk titled "The Fast Way to Happy", presenting the latest research on how the gut microbiome influences mood, behaviour, and mental health. The talk reflects her commitment to translating complex science into compelling, accessible knowledge.
Alongside her clinical work, Olga serves as scientific spokesperson for Gold Collagen, speaks at industry conferences and exhibitions, and has delivered corporate wellness programmes for major financial institutions.
Career
Professional Journey
2020 – Present
Director / Lead Clinician
Private Clinical Practice · 10 Harley Street, London
Specialist clinical practice focused on gut health, SIBO/IMO, microbiome analysis, hormone health, and skin-gut axis conditions. Building personalised programmes for complex cases.
2021 – 2024
Head of Nutrigenetic Science
NGX (Nutri-Genetix), London
Director of Nutrition for the world's first genetically tailored nutritional shake — leading the science behind personalised nutrigenomics-based nutrition.
2018 – 2021
Head of Nutrition & Biomarker Analysis
Bodhimaya / The Lanesborough, London
Leading nutrition and biomarker-based health programmes at a premium wellness destination.
2015 – 2018
Corporate Wellness Consultant
Artizian Catering — Commerzbank, Macquarie Bank, Mizuho Bank
Designing and delivering bespoke workplace wellbeing workshops, healthy cookery classes, lunch & learn sessions, and health retreats for major financial institutions.
2012 – Present
Nutritional Therapist & Functional Medicine Practitioner
Private Practice
Specialising in digestive disorders, skin conditions, weight management, anti-ageing, and hormone health. Trained in Metabolic Balance UK.
Work With Olga
Ready to begin?
Start with a free 15-minute discovery call to explore how Olga can help you.
Root-cause, functional medicine approach to digestive dysfunction — using advanced testing to personalise every treatment plan.
Conditions Supported
Is this you?
Olga works with clients presenting a wide range of digestive and gut-related conditions. Rather than treating symptoms in isolation, she investigates and addresses the underlying drivers.
IBS — Irritable Bowel Syndrome
SIBO — Hydrogen & Methane types
H2S-SIBO (Hydrogen Sulphide)
IMO — Intestinal Methanogen Overgrowth
Leaky Gut / Intestinal Permeability
Gut Dysbiosis & ETBF
Candida & Yeast Overgrowth
Low sIgA / Immune Dysfunction
Bloating & Abdominal Pain
Constipation & Diarrhoea
Rosacea & Skin-Gut Conditions
Gut-Brain Axis & Mental Health
The Approach
How Olga works
1
In-Depth Intake & History
A thorough initial consultation exploring symptom history, diet, lifestyle, stress, previous diagnoses, and medical history — the foundation of a truly personalised plan.
2
Advanced Functional Testing
SIBO breath testing, Microba or GI-MAP stool analysis, DUTCH hormone panels, organic acids, genetic testing, and targeted blood work — selected individually based on your presentation.
3
Root Cause Identification
Results are interpreted in context — looking for patterns, identifying the hierarchy of imbalances, and distinguishing primary drivers from secondary effects.
4
Personalised Treatment Programme
A multi-phase protocol delivered in writing — covering diet, supplements, lifestyle, and where appropriate, GP referrals for pharmaceutical support such as rifaximin.
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Ongoing Review & Adaptation
Regular follow-ups to track progress, review symptom trackers, adjust the protocol, and retest where needed — until resolution is achieved and maintained.
Educational Content
Digestive Health Webinar Series
Watch Olga's digestive health webinar series — designed to demystify the science of gut health, SIBO, and digestion for patients and practitioners alike.
The Secrets to Great Digestion — Part 1
Fixing digestion is the 'holy grail' of health. Part 1 explores how digestive health connects to seemingly unrelated conditions — from allergies to mental health.
The Secrets to Great Digestion — Part 2
Part 2 continues the deep-dive into digestive health science — covering testing, protocols, and the tools Olga uses in clinical practice.
More from Olga
Metabolism & Weight Webinar Series
Olga's two-part webinar series on metabolism and weight management — exploring the science behind why diets fail, and how to work with your biology to achieve lasting results.
Metabolism Webinar — Part 1
A science-led exploration of metabolic health, why conventional approaches fail, and how functional nutrition offers a different path.
Metabolism Webinar — Part 2
Olga continues the metabolic deep-dive, covering nutrition strategies, testing, and the personalised approaches that actually produce lasting change.
TEDx Talk
The Fast Way to Happy
Olga's 2019 TEDx talk presenting the latest research on how gut microbiome health influences mood, behaviour, and mental wellbeing — and what we can practically do about it.
Start Your Journey
Get to the root of your gut issues
Book a free discovery call to explore how Olga can help you finally get answers and lasting relief.
Olga uses an extensive toolkit of advanced functional tests to build a complete, personalised picture of your health — then designs targeted protocols to correct what's out of balance.
Testing Portfolio
Tests Olga uses
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Microba Gut Microbiome Analysis
The most advanced stool microbiome sequencing available in the UK. Provides deep metagenomic profiling of bacterial species, functional capacity, and metabolite production — far beyond standard culture-based tests.
MicrobaMetagenomicsDysbiosissIgA
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GI-MAP Stool Analysis
Quantitative PCR-based stool testing measuring pathogens, bacteria, yeasts, parasites, inflammatory markers, and intestinal health markers — a key tool for gut dysfunction investigations.
GI-MAPH. pyloriParasitesCandida
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LifeCodeGX — DNA Methylation Report
A comprehensive genetic report examining methylation pathways, neurotransmitter metabolism, detoxification capacity, and nutrient processing — used to tailor supplementation and diet at the genomic level.
LifeCodeGXMTHFREpigenetics
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LifeCodeGX — DNA Detoxification Report
Genetic mapping of phase I, II, and III detoxification enzymes — identifying polymorphisms that affect oestrogen metabolism, toxin clearance, and medication response.
CYP enzymesOestrogenPhase II detox
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DUTCH Complete — Hormone Testing
The gold standard in comprehensive hormone assessment — measuring sex hormones, adrenal function, cortisol rhythm, and oestrogen metabolites using dried urine. Essential for perimenopause, PCOS, and hormone-related conditions.
DUTCHOestrogenCortisolPerimenopause
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SIBO Breath Testing
Lactulose and glucose breath tests detecting hydrogen, methane, and hydrogen sulphide gas production — the primary diagnostic tool for SIBO and IMO, interpreted alongside clinical presentation.
H2MethaneH2SLactulose
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Organic Acids Test (OAT)
A urinary metabolic snapshot covering mitochondrial function, neurotransmitter metabolism, yeast and bacterial overgrowth markers, nutrient cofactor status, and detoxification capacity.
OATMitochondriaYeastNeurotransmitters
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Comprehensive Blood Panels
Targeted blood work including full blood count, thyroid panel, iron studies, vitamin D, B12, homocysteine, fasting glucose, HbA1c, liver function, and inflammation markers.
FerritinThyroidB12Vitamin D
Get Tested
Not sure which tests you need?
Olga selects tests strategically based on your presentation. Book a discovery call to find out what testing is right for you.
Engaging, evidence-based wellbeing programmes that give employees the nutritional knowledge to perform at their best.
Keynote Speaker
Trusted by leading organisations
Olga has delivered corporate wellness programmes and keynote presentations at major financial institutions and corporations across London, helping their teams understand the science of nutrition, gut health, energy management, and mental performance.
As a TEDx speaker with genuine clinical expertise, Olga brings something rare to the stage: the ability to make complex science immediately relevant and actionable for a non-specialist audience — without dumbing it down.
Commerzbank
Macquarie Bank
Mizuho Bank
Artizian Catering
What's on offer
Corporate Wellbeing Services
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Keynote Talks
Science-backed keynotes on gut health, nutrition, energy management, stress and the microbiome — tailored to your audience and delivered with clarity and impact.
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Lunch & Learn Sessions
Engaging 45–60 minute lunchtime presentations designed to educate and inspire employees on practical nutrition topics relevant to their daily lives.
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Healthy Cookery Classes
Interactive cookery sessions teaching practical, evidence-based nutrition skills — from gut-friendly meals to anti-inflammatory eating.
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Wellbeing Retreats
Multi-day corporate retreats combining nutrition workshops, health assessments, and wellbeing practices — designed to reset and re-energise your team.
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Wellbeing Programmes
Bespoke, ongoing wellness programmes addressing specific company health objectives — from reducing gut-related absence to improving team energy and mental clarity.
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Employee Health Screening
Individual health assessments and brief consultations for employees — helping your team understand their personal health data and make targeted nutrition changes.
TEDx Talk · 2019
The Fast Way to Happy
In 2019, Olga delivered a TEDx talk presenting the latest scientific research on how nutrition affects mental health — and how the gut microbiome influences how we feel and behave. The talk reflects Olga's ability to translate complex science into compelling, accessible communication.
This is why organisations choose Olga as a keynote speaker — genuine scientific credibility and clinical experience combined with the rare ability to captivate an audience on topics that matter to people's daily lives.
TEDx Talk — Olga Hamilton
Bring Olga to Your Organisation
Enquire about corporate wellbeing
Get in touch to discuss how Olga can help your organisation build a healthier, higher-performing team.
Olga brings evidence-based expertise and scientific authority to brand partnerships — not follower counts, but trust, credibility, and clinical authenticity.
The Science-First Spokesperson
Why brands choose Olga
In an era of saturated influencer marketing, brands in the health and supplement space increasingly need credibility — not just reach. Olga is not a classic influencer. She is a clinically registered practitioner, TEDx speaker, and functional medicine expert who communicates complex science clearly and convincingly.
When Olga speaks about a product, she speaks from the clinic and the research literature. Her audiences — both clinical professionals and health-conscious consumers — trust her recommendations because they know she only endorses what she understands scientifically and uses clinically.
Classic Influencer
Large follower count, low expertise depth
Content driven by aesthetics and reach
Generic endorsements with little evidence base
Audiences follow lifestyle, not expertise
Short-term impact on brand perception
Olga Hamilton
Registered clinician — mBANT, CNHC, MSc, TEDx
Content grounded in published science and clinical trials
Only endorses products she understands and uses clinically
Trusted by health professionals and discerning consumers
Provides long-term credibility and scientific authority
Services for Brands
What a partnership looks like
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Social Media Content
Instagram video and static content combining product education with clinical science — explaining mechanism, ingredients, and evidence in an engaging format.
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Conference & Exhibition Speaking
Representing brands at industry conferences and trade exhibitions, presenting the science behind the product to professional and consumer audiences.
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Press & Media Spokesperson
Media interviews, journalist quotes, and press statements providing clinical credibility and scientific context for brand PR and media campaigns.
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Scientific Content
Copy, educational content, and product explainers developed with clinical accuracy — for brand websites, packaging, and marketing collateral.
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Video Production
Filmed branded content for social media, YouTube, and websites — bringing the science of your product to life through clear, credible storytelling.
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Long-term Ambassadorship
Ongoing partnership as scientific face of a brand — attending events, creating content, and acting as credible spokesperson throughout the year.
Case Study in Partnership
Gold Collagen®
Scientific Spokesperson & Ambassador
Science as the strategy
Gold Collagen is the UK's leading clinically-backed liquid collagen supplement brand. Olga serves as their scientific spokesperson and brand ambassador — bringing clinical nutritional expertise and registered practitioner credibility to their positioning in the health and beauty supplement market.
Rather than celebrity endorsement, Gold Collagen chose Olga specifically for her scientific authority — to communicate the clinical evidence behind collagen supplementation in a way that resonates with both professionals and discerning consumers.
500K+
Views on debut Instagram video
CCR
London 2025 Exhibition — represented Gold Collagen
Exhibition & Speaking — Gold Collagen Events
Science on stage
Olga presents the science behind Gold Collagen at trade exhibitions and consumer events — speaking to packed audiences on collagen biology, hydrolysis, bioavailability, and the evidence base for skin, hair, joint, and gut benefits.
