Understanding Your Tests —
The Five-Test Programme

Blood chemistry is the starting point for every client — not because it's the most informative test, but because it reveals the metabolic foundation on which everything else depends. Thyroid function, blood sugar, inflammation status, nutrient levels, liver function, kidney function, and critically, hydration — all visible from a single blood draw. And hydration, for reasons most practitioners never consider, is where interpretation always begins.

Hydration First — Always

The clinical rationale is personal and direct. My father had low cholesterol, exercised regularly, and had a heart attack requiring a triple bypass. His chronic dehydration — never tested, never addressed by anyone — was a significant contributing factor. Next to breathing, and before food, cellular hydration is the primary principle of human health. But it's overlooked because you can't prescribe it, can't charge for it, can't put it in a pill.

Hydration markers on the blood panel: sodium-potassium balance (cellular hydration indicators), chloride levels, BUN-to-creatinine ratio (kidney function and hydration), haematocrit (concentration — elevated when dehydrated), total protein and albumin (concentration markers). These tell me whether you're hydrated at a cellular level — not just whether you drank water today. You can drink litres of water and still be dehydrated if your electrolytes are imbalanced and you can't hold water in cells, if your kidneys are overworking and flushing water out, or if you're depleting minerals through stress, sweat, or poor absorption.

The GI-MAP uses quantitative PCR technology — the same DNA-based detection methodology used in the most sophisticated medical laboratories — to identify and quantify gut organisms at levels of precision that standard culture-based stool testing cannot approach. A standard NHS stool culture detects perhaps 20–30 species under ideal conditions. The GI-MAP detects hundreds of organisms simultaneously, including parasites, fungi, and bacteria that do not grow on culture media.

The clinical decision to use DNA-based stool analysis is not a preference for novel technology. It's a precision requirement. The organisms most commonly driving chronic gut dysfunction — Blastocystis hominis, Cryptosporidium, Dientamoeba fragilis, SIBO-associated organisms, many Clostridia species — are systematically missed by culture methods. The test you don't run cannot tell you what you need to know.

Standard hormone blood testing gives you a snapshot — one moment in time, one number, no context about rhythm or pattern. DUTCH testing gives you something categorically different: patterns. How hormones fluctuate across the day. How you're metabolising them, not just producing them. What pathways they're taking through your body. This distinction matters profoundly because hormone metabolites — not just hormone levels — determine health outcomes.

Cortisol Patterns — What We're Mapping

Four collection points across the day reveal the complete cortisol curve: cortisol awakening response (CAR — the morning surge that should occur within 30–45 minutes of waking, indicating HPA axis competence), peak morning, afternoon, evening, and midnight. The rhythm matters as much as the absolute level. Common patterns and their clinical interpretations: Elevated throughout (Stage 1 — Alarm, driving the "wired" presentation); High morning then flat or inverted (Stage 2 — Resistance, the exhausted-but-wired pattern); Low throughout (Stage 3 — Exhaustion, HPA burnout, post-exertional malaise, inability to handle stress); High evening (onset insomnia, racing mind, blood sugar dysregulation); Flat morning with high evening (reversed cortisol pattern — often post-traumatic, shift worker, or severely sleep-disrupted presentation).

The OAT measures organic acid metabolites — the byproducts of cellular metabolism that spill into urine — providing a snapshot of what's happening inside your cells. Blood chemistry shows you the dashboard warning lights. The OAT shows you what's malfunctioning in the engine. It's the test that connects the dots between symptoms that appear unrelated: the fatigue, the anxiety, the brain fog, the weight that won't shift, the gut symptoms — all visible simultaneously in the metabolic picture the OAT reveals.

This is IgG food sensitivity testing, not IgE allergy testing. The distinction is fundamental to clinical utility.

IgG sensitivities drive chronic, low-grade inflammation contributing to digestive symptoms, skin conditions (eczema, acne, rosacea), joint pain and inflammation, headaches and migraines, fatigue and brain fog, autoimmune flare-ups, and mood disturbances. The delayed, unpredictable nature of these reactions makes them essentially impossible to identify through dietary trial and error alone.

Three clinical caveats apply to food sensitivity testing. First: food sensitivities often heal once the gut is fixed. Many sensitivities are a consequence of intestinal permeability — partially digested food proteins entering the bloodstream through a compromised gut barrier, triggering immune reactions. Fix the gut, heal the permeability, and many sensitivities resolve over 3–6 months. The foods aren't the primary problem. The leaky gut is. Second: sequence matters. If the gut is severely dysfunctional, you'll react to everything. Better to test and treat gut dysfunction first, then test food sensitivities, remove reactive foods while healing, then retest for reintroduction decisions. Third: this test is the last run, not the first. Used in context of the full picture, it guides a temporary elimination period with a clear reintroduction pathway. Used in isolation, it can produce unnecessary food restriction that impairs nutritional status.