The Resilient Stress System™ — The Map · The Investigation · The Case

Does this sound familiar?

Your stress response has
stopped switching off

You're not just stressed. Something in the system has shifted — the recovery isn't happening the way it used to. The energy doesn't return after a good night's sleep. The calm doesn't come even when the pressure lifts.

◦Exhausted but wired — tired during the day, alert when you should be sleeping

◦Energy has declined progressively — you're managing, but not recovering

◦Mood is lower, patience is shorter, resilience to small setbacks has dropped

◦Appetite and weight have shifted — particularly around the midsection

◦Brain fog, poor focus, memory not what it was — cognitive load feels higher

◦You know you need to change something but don't know which lever to pull first

◦Sex drive has declined, recovery from exercise is slower than expected

◦Your gut has deteriorated alongside the stress — the two feel connected

The problem most approaches miss

The HPA axis doesn't have an off switch — it has a calibration

The hypothalamic-pituitary-adrenal axis is not a battery that runs flat. It is a dynamic, adaptive system that calibrates to the load it expects — and when that load has been chronically high, it recalibrates its baseline upward. The problem isn't that you're stressed. It's that the system has learned to expect stress, and the architecture of your cortisol rhythm has reorganised around that expectation.

This is why rest alone doesn't fix it. Taking a holiday doesn't recalibrate a dysregulated HPA axis. Neither does cutting caffeine, or going to bed earlier, or saying no to more things — though all of these help at the margins. Real recovery requires working directly with the system's regulation mechanisms: circadian rhythm, vagal tone, glycaemic stability, adrenal nutritional support, sleep architecture, and the neurochemical environment that governs cortisol output.

"The intervention for a depleted cortisol pattern is the opposite of the intervention for an elevated one. Without testing, you're guessing — and the wrong intervention makes it worse."

The DUTCH Plus hormone assessment measures your full 24-hour cortisol pattern, your cortisol awakening response, DHEA and DHEA-S, oestrogen and testosterone metabolism, melatonin, and the dopamine and norepinephrine metabolites that determine your neurochemical resilience. It shows which cortisol pattern you're in on the collection day — and that changes everything about how recovery should proceed.

Three Cortisol Patterns — and Why Each Needs a Different Emphasis

Pattern · Activated

High output, high demand

Cortisol elevated across the day, particularly afternoon and evening. The system is working hard to meet a genuinely high load. Energy is maintained but at the cost of sleep, recovery, and downstream hormone production (testosterone, progesterone, melatonin).

DUTCH: elevated total cortisol metabolites · blunted evening decline

Pattern · Disrupted rhythm

Inverted rhythm, wired and tired

Cortisol pattern has inverted — low morning output, elevated evening. The morning surge that drives motivation and readiness is weak, but the system stays activated when it should be winding down. The defining presentation: exhausted but unable to rest.

DUTCH: blunted CAR · elevated evening cortisol · disrupted melatonin

Pattern · Low output

Flat curve, low output

Total cortisol output reduced. The axis has turned its own output down; the adrenal glands haven’t worn out. Often comes with low DHEA, profound fatigue, poor stress tolerance and frequent illness. Very low output is checked with your GP first, to rule out adrenal insufficiency. Recovery is usually slower and starts with eating enough, sleep and pacing.

DUTCH: low total metabolites · low DHEA-S · flattened diurnal curve

The Programme Framework

Five phases. Built around
how recovery actually works.

The Resilient Stress System™ follows a sequenced clinical framework. The order matters — beginning with the most fundamental regulatory systems and building progressively toward long-term resilience. The programme adapts to your cortisol pattern; the emphasis for a low-output pattern differs from that for an activated one.

Stabilise the Nervous System First

Before anything else, the autonomic nervous system needs a reliable parasympathetic signal. Breathwork, circadian rhythm anchoring, blood sugar stabilisation, and load reduction. The system cannot begin to recalibrate while the stressor load exceeds recovery capacity.

DUTCH-guided: CAR assessment informs morning protocol timing

Rebuild the Nutritional Foundation

Eating too little, too little protein, or genuine shortfalls in nutrients such as iron, vitamin D or B12 make recovery harder. This phase checks your diet and results and fixes the real shortfalls — rather than assuming stress has drained a fixed list of nutrients, which hasn’t been shown.

Guided by your diet and test results, not by a stage

Recalibrate Sleep Architecture

Testosterone is produced during deep sleep. Growth hormone pulses require slow-wave sleep. Melatonin suppresses cortisol. The relationship between sleep and HPA function is bidirectional and clinically inseparable. This phase restores sleep architecture as a direct HPA recovery intervention — not as a secondary lifestyle consideration.

DUTCH-guided: melatonin metabolite and evening cortisol inform sleep protocol

Calibrate Movement to Your Pattern

High-intensity exercise is a cortisol stimulus. With an activated pattern that can be productive; with a low-output pattern and post-exertional fatigue, it is paced and built slowly. This phase introduces movement matched to how you respond — from restorative practice to progressive loading. Movement is medicine here only when it matches the system's actual capacity.

DUTCH-guided: DHEA:cortisol ratio determines exercise intensity ceiling

Build Sustained Resilience

The final phase builds the regulatory capacity that makes the system genuinely resilient — not just managed. This means developing the ability to mount an appropriate stress response and recover from it fully, rather than living in permanent low-grade activation. The goal is not the absence of stress. It is the ability to move through it.

Three Levels of Support

The Map. The Investigation.
The Case.

The programme framework is the same across all three tiers. What changes is the depth of clinical investigation — whether we know your cortisol pattern from DUTCH testing, and how much practitioner oversight accompanies the process. Every tier carries full upgrade credit if you move up within 60 days.

Tier One · The Map

The Map

The complete programme, self-paced

£697

One-time · Full programme access

What's included

8 guided modules — all five phases
Practice Better portal access
Video lessons + written content
Stress pattern self-assessment tools
Pattern-adaptive protocol framework
Sleep, nutrition, movement guides
Breathwork and nervous system tools
Lifetime access to all materials

Enrol Now →

Upgrade to The Investigation within 60 days — £697 applied in full

What the DUTCH reveals that no standard test can

A serum cortisol drawn at 9am gives you one data point. The DUTCH Plus gives you 24 hours of hormone data — the full architecture of your stress response, from the morning surge that should drive your motivation to the evening decline that should allow your sleep. Collected at home, at four time points, on dried urine.

Cortisol Awakening Response

Morning drive and readiness

The 50–160% cortisol spike within 30–45 minutes of waking. Blunted CAR explains the person who wakes unrefreshed, struggles to start the day, and needs two hours before functioning properly. Not laziness — a dysregulated morning surge.

Diurnal Cortisol Pattern

The 24-hour rhythm

The full arc of cortisol across morning, noon, evening, and night. An inverted pattern — low morning, high evening — is the disrupted-rhythm pattern. The pattern determines everything about timing of interventions, exercise, and sleep support.

Total Cortisol Metabolites

HPA output — Pattern identification

Total daily cortisol production. High metabolites with an elevated curve = activated pattern. Low metabolites with a flat curve = low-output pattern. The two call for different emphasis in load, movement and recovery.

DHEA and DHEA-S

The anabolic counter to cortisol

DHEA is the primary counterbalance to cortisol's catabolic effects. Low DHEA relative to cortisol means the system is running catabolic — breaking down tissue, impairing immune function, accelerating biological ageing. The ratio determines the recovery strategy.

Dopamine + Norepinephrine Metabolites

Neurochemical resilience

HVA (dopamine) and VMA (norepinephrine) reveal the neurotransmitter picture underpinning the stress response. Low dopamine turnover explains flat motivation and reward insensitivity. Elevated norepinephrine explains the hypervigilant, can't-switch-off presentation.

Melatonin (6-OHMS)

Sleep signal and cortisol suppression

Melatonin suppresses cortisol evening output and governs sleep architecture. Low melatonin in the context of high evening cortisol is a clinically significant finding — the two systems are working against each other. This pattern requires specific intervention beyond standard sleep hygiene.

Your Practitioner

BSc (Hons) Developmental Biology
PG Dip Health Informatics
MSc Coaching & Applied Physiology
FDN-P · Metabolic Typing Advisor L2
Working With People Since 1988
Edinburgh

Clinical rigour.
Human practice.

Stephen Duncan is a Functional Diagnostic Nutrition Practitioner with a background spanning developmental biology, applied physiology, and over two decades of functional medicine clinical practice in Edinburgh.

The Resilient Stress System™ draws on the same clinical framework that underpins the TDG Five-Test Programme — HPA axis assessment, DUTCH interpretation, and the stress-physiology connections between cortisol, gut function, immune regulation, and metabolic health. It is the entry point for people whose primary clinical picture is stress-driven rather than gut-driven.

For clients whose stress picture intersects with gut dysfunction, hormonal disruption, or metabolic dysregulation, the full TDG programme offers comprehensive five-test investigation with your full RSS investment applied as credit if you upgrade within 60 days.

Your stress response hasstopped switching off

The HPA axis doesn't have an off switch — it has a calibration

Five phases. Built aroundhow recovery actually works.

The Map. The Investigation.The Case.

What the DUTCH reveals that no standard test can

Clinical rigour.Human practice.

Your stress response has
stopped switching off

Five phases. Built around
how recovery actually works.

The Map. The Investigation.
The Case.

Clinical rigour.
Human practice.