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A clinical approach to fat loss

Why diets stop working.

If you've tried everything and the weight won't shift, the problem usually isn't willpower. Sometimes it's the basics hiding in plain sight — sleep, protein, a plan you can't sustain. Sometimes it's a medication. And sometimes it's a physiological pattern that dieting alone doesn't address. This is how we find out which.

Find My Pattern — Free → How it works
900+
Clinical data points analysed
1988
Working with people since
200+
Clinical patterns mapped
The problem with conventional weight loss

Calories matter. They are not the whole story.

Energy balance is real — no hormone lets your body make fat out of nothing. But what you eat changes how much you eat, and the same plan produces wildly different results in different people. In one year-long trial of 609 adults, results on the same diet ranged from 30 kg lost to 10 kg gained.

Some of that difference is sleep, stress, medication, and whether a plan fits your life. Some of it is physiology: insulin resistance, an underactive thyroid, hormonal change. These rarely make fat loss impossible, but they can make it much harder — and they can make standard advice backfire.

The solution isn't trying harder. It's finding out what is actually getting in your way — and dealing with that first.

The five fat loss resistance patterns

The basics first. Then five patterns worth checking.

00
The Basics
Sleep, protein, consistency, and medications that cause weight gain. These are checked first because they are the most common reasons fat loss stalls.
01
Insulin Resistance
Persistently high insulin makes stored fat harder to release and can drive hunger. Common, measurable with fasting insulin, and very responsive to the right changes.
02
HPA Axis Dysregulation
Chronic stress disrupts sleep, appetite and cravings, and very high cortisol drives central fat. Stress mostly acts through sleep and behaviour rather than through cortisol alone.
03
Thyroid Insufficiency
An underactive thyroid slows metabolism and causes modest weight gain. Worth ruling out properly with a full panel — though a result in the normal range is rarely the hidden cause.
04
Gut Microbiome Disruption
Gut bacteria influence appetite hormones, inflammation and how you feel after eating. Their direct role in human fat loss is still being worked out, but gut symptoms are worth resolving in their own right.
05
Systemic Inflammation
Chronic low-grade inflammation is linked to insulin resistance and disrupted appetite signalling. It is measurable, and usually a sign of something else worth finding.
Take the Free Pattern Finder →

18 questions · 3 minutes · Identifies your dominant pattern

The Detective Health approach

Clinical pattern analysis. Not another diet plan.

The Detective Health platform uses a structured clinical analysis system built on nearly forty years of working with people. It doesn't guess — it analyses your data across 900+ clinical data points and identifies specific patterns from a library of 200+ clinical patterns.

This is clinically-directed AI analysis — artificial intelligence trained on the clinical logic of functional diagnostic nutrition, not a generic wellness algorithm. The protocols it generates are built on the same framework used in practice for nearly four decades.

Built with AI. Not built on AI. The clinical logic is mine. The platform operationalises it at a scale that wasn't previously possible.

01
Weight Loss Pattern Finder
Identifies your dominant resistance pattern from 18 clinical screening questions. Free, 3 minutes, gives you an immediate clinical answer — not a vague category.
02
Metabolic Nature Classification
40-question assessment giving a working starting point for how you eat, then confirmed by how you actually respond. A framework for structured experimentation, not a validated diagnostic test.
03
Weight Loss Engine
Full multi-system analysis incorporating blood chemistry, hormonal data, gut findings, and lifestyle variables into a targeted protocol.
04
Health Status Report
A comprehensive clinical overview of your health across all seven body systems, compiled before your consultation.
05
Drug–Nutrient Analysis
If you're on medication, the platform flags known drug–nutrient depletions worth measuring and discussing with your prescriber.
Your journey

What actually happens

01
Take the Pattern Finder
18 questions identify your dominant fat loss resistance pattern. Free, takes 3 minutes, gives you an immediate clinical answer — not a vague category.
Free · 3 minutes
02
Complete Your Intake
12 clinical intake forms covering your full health picture — symptoms, lifestyle, history, medications, and movement. Submitted securely before your session.
Online · 3–4 hours total
03
Receive Your Health Status Report
Stephen reviews everything and compiles your Health Status Report — a clinical overview across all systems identifying your priority patterns and testing pathway.
Before your consultation
04
Your Consultation
45 minutes with Stephen. Your Health Status Report reviewed together, test results interpreted, and your personalised weight loss protocol designed around your specific pattern.
£145 · 45 minutes
Ready to find out?

The Detective Health Weight Loss Consultation

£145
Initial Consultation — Everything included
  • Free Weight Loss Pattern Finder (your starting point)
  • Your Case File — six forms, 1–2 hours in as many sittings as you like
  • Health Status Report prepared before your session
  • 45-minute consultation with Stephen Duncan FDN-P MSc
  • Fat Loss Resistance Pattern analysis with clinical explanation
  • Personalised testing pathway based on your pattern
  • Metabolic Nature classification and nutritional framework
  • Your Health Status Report to keep, and agreed next steps. The £145 is credited against a programme if you go ahead within 60 days, not against single tests.
Book Your Consultation →

Secure booking via Practice Better · Cancel or reschedule 48+ hours in advance

Stephen
Duncan
FDN-P · MSc · Edinburgh
Working with people since 1988
Functional Diagnostic Nutrition Practitioner
Metabolic Typing Advanced Practitioner
Co-founder, Omnos Health
(integrated with Regenerus Labs)

"Weight is almost never a simple energy equation problem. In nearly forty years of working with people, I have yet to see a case of genuine treatment-resistant weight gain that didn't have a clear, identifiable physiological cause."

I started my clinical career before functional medicine had a name for what I was observing — that the same diet would produce dramatically different results in different people, and that the difference was almost always something measurable in the biochemistry.

Over nearly four decades, I've trained with some of the leading figures in the field — Bill Wolcott's Metabolic Typing, Reed Davis's Functional Diagnostic Nutrition framework, Bryan Walsh's biochemistry model. I've seen how Mounjaro and Ozempic work and why — they mimic GLP-1, the gut hormone that regulates insulin and appetite. But they don't address why GLP-1 was dysregulated in the first place.

The Detective Health platform represents nearly forty years of pattern recognition, translated into a systematic process that identifies the cause — not just the symptom. Test, don't guess. That's the only approach that produces lasting results.

Start here

Find your pattern. Then fix it.

Take the free 3-minute Pattern Finder. Then book your consultation and get a clinical answer to why weight loss has been so difficult for you specifically.

Take the Pattern Finder — Free → Book an Initial Consultation — £145