Save with a Bundle
Curated combinations at a reduced price — for when you know you need more than one.
The Five-Test Interpretation Bundle
All five PDF reading guides covering every test in the TDG programme — GI-MAP, DUTCH Plus, Blood Chemistry, OAT, and Food Sensitivity. Everything you need to understand your results across all five tests.
- GI-MAP Interpretation Guide
- DUTCH Plus Hormone Guide
- Blood Chemistry Interpretation Guide
- OAT Interpretation Guide
- Food Sensitivity Framework
The Interactive Tools Bundle
All four interactive interpretation tools in one bundle — enter your results and receive personalised clinical interpretation across blood chemistry, hormones, gut, and organic acids.
- Blood Chemistry Interpretation Tool
- DUTCH Plus Hormone Guide Tool
- GI-MAP Stool Analysis Tool
- OAT Interpretation Tool
The Metabolic Health Bundle
The three guides that address the metabolic picture together — weight loss resistance, blood sugar and insulin, and the supplement framework that supports both. The complete metabolic investigation starting point.
- Weight Loss Resistance — Clinical Investigation
- Blood Sugar & Metabolic Health
- Before You Buy Another Supplement
The Brain & Nervous System Bundle
The three guides covering the neurological and stress picture — ADHD and neurotransmitter balance, the gut-brain axis, and the HPA axis. The upstream drivers of focus, mood, and cognitive function.
- ADHD & Brain Health
- The Gut-Brain Axis
- Stress & the HPA Axis
Bundle links active once Gumroad listings are created — see individual products below while bundles are being set up
Interactive Clinical Tools
Enter your values. Receive personalised interpretation. Browser-based — not PDFs.
DUTCH Plus Hormone Guide
Personalised interpretation of every marker on your DUTCH Plus report. Cortisol rhythm, oestrogen pathways, testosterone, melatonin, and organic acids — all 40+ markers covered.
- All 40+ DUTCH markers personalised
- Diurnal cortisol and HPA patterns
- Oestrogen methylation pathways
- Single HTML file — works in any browser
GI-MAP Stool Analysis Guide
Enter your GI-MAP values. Personalised interpretation of every marker — pathogen load, microbiome, digestive function, permeability, and severity-routed clinical next steps.
- All GI-MAP sections personalised
- Catches pathogens standard culture misses
- Severity-routed clinical next steps
- Single HTML file — works in any browser
Blood Chemistry Interpretation Guide
Enter your results. Functional interpretation — pattern recognition, cross-marker relationships, and clinical significance at a level standard lab reports never reach.
- Functional vs standard reference ranges
- Personalised pattern recognition
- RDW, HbA1c, fasting insulin in depth
- Single HTML file — works in any browser
OAT Interpretation Guide — Interactive Tool
Enter your OAT values across six sections. Personalised interpretation, five clinical patterns detected, priority action plan. Includes Quick Reference Guide PDF companion.
- All six OAT sections personalised
- Five cross-section pattern detectors
- Priority action plan from your results
- Includes Quick Reference Guide PDF
Blood Chemistry Health Audit
Comprehensive functional interpretation of your blood values — functional ranges, cross-marker patterns, and clinical significance beyond what standard lab reports provide.
- Functional vs standard reference ranges
- Full pattern recognition engine
- Cross-marker clinical relationships
- Single HTML file — works in any browser
Clinical Programme
Complete structured protocol — three phases, three intensity levels, week by week.
8-Week Detoxification Programme — Complete Clinical Protocol
The real biochemistry of detoxification — Phase I and Phase II liver enzyme pathways, binders, sauna, and the food matrix. Not a juice cleanse. Week-by-week supplement tables at three intensity levels, troubleshooting for detox reactions, pre-protocol readiness checklist, pre/post testing markers, and a full maintenance calendar covering daily through annual practices.
Clinical Guides — £37
Deep dives from the Test, Don't Guess framework — the science, the testing, and the targeted protocol.
Blood Sugar & Metabolic Health
The insulin resistance epidemic begins a decade before fasting glucose rises. The five-stage metabolic timeline, how the natural GLP-1 system works, why HbA1c is a lagging indicator, and what the five-test investigation reveals that standard testing misses entirely.
- Five-stage insulin resistance timeline
- Why fasting insulin beats HbA1c for early detection
- The natural GLP-1 system explained
- What testing reveals before diagnosis
Men's Health: A Functional Approach
Most men with low testosterone don't need TRT — they need to know why it's low. Eight suppression drivers, the LH diagnostic key, the three-phase optimisation protocol, hair loss beyond finasteride, prostate, male fertility, and the fertility caveat that must precede any TRT conversation.
- LH — the marker that changes everything
- Three-phase natural optimisation protocol
- The fertility caveat before any TRT prescription
- Two detailed clinical case studies
Immunity, Inflammation & Detoxification: The Clinical Trinity
Recognition, response, resolution — one continuous process in three phases. Interrupt any phase and you convert an acute appropriate response into a chronic problem. Covers omega-3 and the resolution mechanism, Phase I/II liver biochemistry, autoimmunity, and why sIgA is the most important marker practitioners never measure.
- Why suppressing inflammation often perpetuates it
- Omega-3 and the resolution mechanism
- Phase I/II liver detox biochemistry
- The functional approach to autoimmunity
Stress & the HPA Axis: A Deep Dive
The master regulator that conventional medicine almost never investigates. Three stages of HPA dysfunction and why Stage 1 treatment worsens Stage 3. The cascade through thyroid, sex hormones, blood sugar, gut, and immunity. Includes the practitioner's personal account of new parenthood, sleep deprivation, and hormonal breakdown.
- Three HPA stages with stage-specific protocols
- Cortisol's cascade through six body systems
- Vagal tone — trainable, not fixed
- The personal clinical account
The Gut-Brain Axis
Your gut has 500 million neurons. The vagus nerve is 80% gut-to-brain. How Clostridia blocks the dopamine-norepinephrine pathway. How the tryptophan steal explains treatment-resistant depression. The OAT marker that identifies it. The five-priority intervention sequence.
- Clostridia blocking the dopamine-norepinephrine pathway
- Quinolinic acid — the treatment-resistant depression marker
- The oestrobolome and hormone-gut-brain link
- Five-priority intervention sequence
Thyroid: The Full Picture
You can have every hypothyroid symptom with a completely normal TSH. The five failure points TSH cannot see. Reverse T3 — the inactive blocker. Hashimoto's triggers and how to address them at root cause. The targeted protocol for conversion failure — the most common missed pattern.
- Five failure points — TSH sees none
- Hashimoto's triggers and root cause approach
- Cortisol as the primary conversion blocker
- When T4 medication alone is insufficient
Women's Health & Hormones
PCOS is a metabolic condition — the pill doesn't treat it. Oestrogen dominance is frequently a gut problem. Perimenopause is years of unpredictable fluctuation. Four PCOS phenotypes, the 2-OH/4-OH oestrogen pathways, the oestrobolome, MTHFR and oestrogen methylation, and two detailed clinical cases.
- Four PCOS phenotypes with distinct protocols
- Beta-glucuronidase — the gut driver of oestrogen dominance
- The 2-OH/4-OH/16-OH metabolite ratios that matter
- Catherine's perimenopausal transformation
Food Sensitivity Results: A Clinical Framework
How to act on your results without creating nutritional gaps — integrated with GI-MAP, OAT, DUTCH, and blood chemistry. The 4-day rotation protocol, conflict resolution when tests disagree, and the full reintroduction sequence.
- Four-test integration framework
- 4-day rotation protocol
- Conflict resolution when tests disagree
- Reintroduction sequence and timing
Weight Loss Resistance
Five biological patterns that block fat loss regardless of caloric intake. The investigation standard medicine never runs — and the intervention sequence that determines whether anything else works.
- Five clinical patterns with full protocols
- Why the same diet fails different people
- Six-level intervention hierarchy
- Three clinical case studies
Reading Guides — £27
Companion reading guides to the interactive tools and the broader framework.
Sleep & Circadian Health
You don't have a sleep problem. You have a light problem — or a cortisol problem, a blood sugar problem, a gut problem. Circadian biology, the glymphatic system, the historical first and second sleep, and the five-test investigation.
OAT Interpretation Guide
Six sections, 40+ markers, five clinical patterns. Microbial, energy, neurotransmitter, detoxification, and amino acid markers — with cross-test integration.
GI-MAP Interpretation Guide
Every marker on your GI-MAP stool analysis — pathogens, microbiome, digestive markers, permeability — and how each connects to the rest of the five-test programme.
DUTCH Plus Hormone Guide
Every DUTCH Plus marker explained — cortisol diurnal pattern, oestrogen metabolites, testosterone, melatonin, neurotransmitter metabolites. The companion reading guide to the interactive tool.
Blood Chemistry Interpretation Guide
Functional ranges, cross-marker patterns, and clinical significance beyond standard lab reports. The companion reading guide to the interactive tool.
Before You Buy Another Supplement
What actually works, what to test first, when to take it. 14 core supplements reviewed — timing, interactions, quality markers, and test-first protocols.
Move Well First — Quick Reference
All 13 Move Well First modules distilled to one non-negotiable each — with clinical notes connecting each to your functional test results.
Books & Full Programmes
The complete clinical education — from the full book to the clinical manual and movement science.
Test, Don't Guess — Digital Edition
The full book. Volumes 1 and 2. From body systems and the five-test programme through metabolic typing, intervention protocols, and clinical conditions. The complete functional medicine education.
- 37 chapters across two volumes
- Metabolic typing self-assessment
- Full clinical appendices A–Y
- Includes the practitioner's story
The TDG Clinical Manual
A complete functional medicine education across 13 modules — from why generic advice fails through the five-test programme, metabolic typing, hormonal balance, and building your personalised protocol.
- 13 modules, 8+ hours of clinical reading
- Nutrition, stress, gut, hormones, metabolism
- Metabolic typing self-assessment
- Protocol-building framework
The Science of Movement as Medicine
Why how you move matters more than how much you move. VILPA, Zone 2, power training for longevity, and five clinical training templates matched to your functional test results.
- 12 chapters of movement science
- DUTCH, OAT & GI-MAP integration
- Five clinical training templates
- The motor learning neuroscience
TDG Starter Kit
The complete introduction to the Test, Don't Guess approach — what the five tests reveal, what drives the most common patterns, and how to decide whether the full programme is right for you.
- Full TDG methodology overview
- The five-test programme explained
- Common clinical pattern frameworks
- Decision guide for next steps
45 minutes. Your health history reviewed before you arrive. Clear direction, a specific testing pathway, and an honest conversation about which programme is the right fit. £145, credited against any programme if you proceed.