TDG
Test, Don't Guess — Edinburgh

The clinical investigation
your health has been
waiting for.

Most people spending years managing symptoms that haven't been investigated — only treated. The Detective Health Consultation starts differently: with a systematic clinical analysis of your health across all seven body systems before we've spoken a single word.

Book Your Consultation — £145 How it works
900+
Clinical data points
37
Years experience
7
Body systems assessed
Why conventional doesn't work

Your symptoms have been managed.
Not investigated.

Conventional medicine is exceptionally good at diagnosis and emergency care. It is much less good at the question most people actually have: "I don't feel well, and nobody can tell me why."

Fatigue, brain fog, gut dysfunction, weight that won't shift, hormonal disruption, poor sleep, recurring infections, autoimmune symptoms — these are the patterns conventional medicine struggles with, because they require investigation across multiple systems simultaneously rather than referral to seven separate specialists.

The Test, Don't Guess approach is built specifically for this gap. We investigate first, then treat. The clinical logic is simple: if you don't know the cause, the treatment is a guess.

What we assess

Seven systems. One comprehensive picture.

Most symptoms have roots in more than one system. The Detective Health platform analyses all seven simultaneously — because that's how the body actually works.

🔬
Digestive & Gut
⚗️
Hormonal
⚡
Metabolic
🏃
Movement
🛡️
Immune & Inflammatory
♻️
Detoxification
🌙
Sleep & Circadian
Your investigation

Exactly what happens — in order.

01
Book your consultation
A secure booking through Practice Better. You'll receive your portal access and intake guide immediately after. The £145 consultation fee includes everything below.
Now
02
Complete your twelve intake forms
Twelve structured assessments covering your full clinical picture — health history, symptoms, lifestyle, stress load, medications, movement, nutrition phenotype, and food log. Usually completed across 2–3 sittings, total 3–4 hours. Each form submits directly and securely to Stephen.
Before your session
03
Your Health Status Report is compiled
Stephen reviews all twelve forms and compiles your Health Status Report — a clinical overview of your health across all seven body systems, identifying priority patterns and the testing pathway most likely to explain your presentation. You receive this before your session.
Before your session
04
Your Detective Health Consultation
One hour with Stephen. Your Health Status Report is reviewed together. Patterns are explained in clinical and plain language. The specific tests most likely to confirm the root cause are agreed. Your Metabolic Nature and initial nutritional framework are introduced. You leave with clarity, a plan, and a testing pathway.
£145 · 1 hour
What you receive before your session

Your Health Status Report.
900+ data points. One clear picture.

The Health Status Report is compiled from your twelve intake forms before your consultation. It means your first session goes straight into findings — not history-taking.

🧬
Your Metabolic Nature
One of six distinct physiological types, each requiring a different nutritional approach. Determined from 40 questions across 10 domains of autonomic and metabolic function.
🔍
Seven-System Pattern Analysis
Which of your seven body systems are most burdened, which symptoms cluster together into clinical patterns, and what those patterns suggest about underlying cause.
⚖️
Allostatic Load Assessment
Your total biological stress burden — physical, chemical, psychological, environmental. Often the most revealing dimension of a chronic health picture.
💊
Drug-Nutrient Depletion Map
If you're on medication, the specific nutrients being pharmacologically depleted — and what to address before testing begins.
🧪
Priority Testing Pathway
The specific functional tests most likely to confirm the root cause — ordered by clinical priority based on your intake data.
🌿
Initial Nutritional Framework
The nutritional approach aligned to your Metabolic Nature — before a single lab result comes back. A functional starting point for your protocol.
Everything included

The Detective Health Consultation

Full clinical investigation · Everything included
£145
Detective Health Consultation
  • Secure client portal access with 12 intake forms
  • Full Health Status Report (7-system clinical overview)
  • Metabolic Nature classification (6 physiological types)
  • Allostatic load and stress burden assessment
  • Drug-nutrient depletion analysis (if applicable)
  • Priority functional testing recommendations
  • One-hour consultation with Stephen Duncan FDN-P MSc
  • Written summary and agreed next steps after your session
Book Your Detective Health Consultation →
Secure booking via Practice Better · stephen@detective-health.com · detective-health.com
Stephen
Duncan
FDN-P · MSc · Edinburgh
BSc (Hons) Developmental Biology · University of Glasgow
Postgraduate Diploma Health Informatics · University of Glasgow
MSc Coaching Studies & Applied Physiology · Heriot-Watt University
Functional Diagnostic Nutrition Practitioner (FDN-P)
Metabolic Typing Advanced · Healthexcel
37 years clinical and coaching experience
Co-founder, Omnos (Regenerus Labs)
@stephenduncan_guthealth
"The question functional medicine asks is the one conventional medicine rarely gets to: not 'what is wrong with you?' but 'why has this happened to you?'"

I've been working in health and fitness for 37 years — starting as an athletics and boxing coach at 18, long before I had letters after my name. The academic side came later: a BSc in Developmental Biology from Glasgow, a Postgraduate Diploma in Health Informatics, and an MSc in Coaching Studies and Applied Physiology from Heriot-Watt — the programme run alongside the Applied Sports Science course at Loughborough. I was the first to complete it.

The clinical side came through Functional Diagnostic Nutrition under Reed Davis, Metabolic Typing through Healthexcel, and years of building and refining a framework that actually produces answers. I co-founded Omnos, a functional laboratory software platform now integrated with Regenerus Labs, and built the TDG Clinical Tool Suite used in this practice.

In that time, I've seen the same pattern repeatedly: intelligent, motivated people told their tests are "normal" while feeling anything but. The issue is almost never that something isn't wrong — it's that the wrong tests are being ordered, or the right tests are being interpreted against the wrong reference ranges.

The Detective Health platform operationalises 37 years of this clinical logic. It's the investigation I wish I could have done at the start of my career — with the precision and depth that wasn't available then. Test, don't guess. Always.

TDG

Stop managing.
Start investigating.
One session.

The answers you haven't been able to find might be closer than you think. They just need the right questions — and the right tests.

Book Your Consultation — £145 Ask Stephen a question first