△ Practitioner-reviewed

Your blood results.
Actually explained.

Send me your NHS or private blood chemistry results. I’ll tell you what they actually mean — what’s been missed, what the reference ranges aren’t telling you, and what to prioritise first. Written report within 7 working days.

Get your audit — £295 → How it works

One-off · Async delivery · No consultation required · 7 working days

Blood Chemistry Audit

Health Audit

^£295

One-time · Written report · 7 working days

✦Full functional range interpretation

✦Pattern identification across all markers

✦Priority findings — what matters most

✦Plain language — no clinical shorthand

✦Recommended next steps

✦Written by Stephen Duncan MSc FDN-P

Get your audit →

What actually happens with your blood results

Your doctor said they were normal.
That’s not the same as fine.

The NHS reference ranges used to interpret standard blood tests are set to identify frank disease — not to identify functional decline, early-stage dysfunction, or the kind of suboptimal findings that explain years of symptoms without a diagnosis. A result that sits inside the reference range can still be significantly impacting your energy, your thyroid function, your blood sugar regulation, and your hormone balance.

And that’s before we get to the markers that simply aren’t tested, the panels that aren’t run consistently from year to year, or the results that are never discussed because nothing flagged as abnormal — even when the trend across four years tells a completely different story.

“Ferritin came back at 14. GP said it was in range. She’s been exhausted for three years, losing hair, and can’t concentrate past noon.”

△ Functional optimal: 70–100 μg/L — lab flags deficiency at <10

“Fasting glucose was elevated in 2022. Nobody mentioned it. HbA1c flagged as pre-diabetic in 2026. Four years of progression that could have been addressed.”

△ Trend analysis across years reveals what single results miss

“TSH is 2.8 — normal. But free T3 is low, reverse T3 is elevated, and he has every symptom of underactive thyroid. Just not one that shows on the single marker tested.”

△ TSH alone cannot assess thyroid function adequately

“Sent for bloods without fasting instructions. Glucose and triglycerides are meaningless without fasting status. The result is in range. The interpretation is unreliable.”

△ Fasting status affects at least 8 standard markers significantly

What you receive

A written clinical report.
Not a printout with arrows.

The Health Audit is a practitioner-written report — reviewed and written by Stephen Duncan MSc FDN-P — interpreting your blood chemistry results against functional optimal ranges, identifying patterns across markers, and giving you clear priority findings with recommended next steps.

Functional Range Assessment

Every marker you’ve provided assessed against functional optimal ranges — not just lab reference ranges. Flagged as optimal, suboptimal, or investigate with a plain-language explanation of what each finding means.

Pattern Identification

The patterns that emerge across multiple markers — thyroid conversion patterns, blood sugar regulation, inflammatory load, iron and anaemia patterns, liver stress markers — that aren’t visible when you look at each result in isolation.

Priority Findings

The two or three things most worth your attention, ranked by clinical significance. Not a list of everything that’s suboptimal — a clear hierarchy of what to address first and why.

Recommended Next Steps

Honest recommendations: self-care actions where appropriate, further testing worth considering, and a clear indication of whether a more comprehensive clinical investigation is likely to be useful for your situation.

“In 37 years of clinical practice I have yet to see a blood chemistry panel where a properly conducted functional interpretation found absolutely nothing worth addressing. The markers are there. The information is there. It just requires someone who knows how to read it.”

Stephen Duncan MSc · FDN-P · Founder, Detective Health

The process

Four steps. Seven working days.
No appointment needed.

Purchase

Buy the Health Audit through Gumroad. You’ll receive a confirmation email immediately with submission instructions.

Send your results

Email your results to hello@detective-health.com. PDF, photo, or typed values — the submission guide covers exactly how to get and share your results.

Clinical review

Stephen reviews your results against functional optimal ranges, identifies patterns, and writes your personalised report. No templates. No automation.

Report delivered

Your written report arrives by email within 7 working days. Clear, plain-language findings you can act on — or take into your next GP appointment.

Getting your NHS results — a quick guide

You have a legal right to your NHS blood results. Here’s the quickest way to get them:

NHS App (fastest)

Download the NHS App → Health record → Test results. Screenshot or PDF export each result panel. Most practices display results within 24 hours of processing.

Patient Access / SystmOnline

If your practice uses Patient Access or SystmOnline, log in, go to Medical Record → Test Results. Download as PDF where the option exists.

Ask your GP receptionist

Request a printed copy of your results at reception. You’re entitled to them. If they ask why: “I’d like to keep a personal record.” No further explanation required.

Sending them to us

PDF is best. Clear photos are fine. If results span multiple visits, include them all — trend analysis across time is often the most revealing part. Email to hello@detective-health.com with your order reference.

What changes with functional interpretation

The same results.
A completely different picture.

Standard NHS blood interpretation identifies disease. Functional interpretation identifies dysfunction — the suboptimal state that produces real symptoms long before disease-level thresholds are crossed.

Standard NHS Interpretation

⊖Reference ranges based on population averages

⊖Each marker assessed individually

⊖Result either flags or it doesn’t

⊖Fasting status rarely documented

⊖Trends across years rarely reviewed

⊖Incomplete panels inconsistently repeated

⊖Normal result = nothing to act on

Detective Health Functional Audit

✦Functional optimal ranges for each marker

✦Pattern analysis across all markers

✦Gradient assessment — optimal to investigate

✦Fasting status noted and factored in

✦Multi-year trend analysis where available

✦Missing markers identified and flagged

✦Clear priority findings with next steps

Common questions

Before you order.

Can I send private blood results as well as NHS?

Yes. Results from Randox, Medichecks, Thriva, Bluecrest, Nuffield, or any private lab are all suitable. The more complete the panel, the more the audit reveals.

What if I only have a few markers?

Send what you have. Even a basic NHS panel — FBC, liver, kidney, thyroid, glucose — provides meaningful data when interpreted functionally. More is better, but less is still useful.

Can I send results from several years?

Please do. Trend analysis across time is often more revealing than any single result. Patterns that are invisible in one panel become clear across three or four annual tests.

My results are on paper or a photo — is that ok?

Yes. Clear photos are fine — take them in good light, ensure all values and reference ranges are readable. If you have multiple pages, send them all. PDF is ideal if your practice offers it.

Is this a diagnosis or medical advice?

No. The Health Audit is a functional interpretation — an assessment of your markers against optimal ranges with clinical observations and recommendations. It doesn’t replace your GP. It gives you information to have a better conversation with them.

What if my audit suggests I need more comprehensive testing?

The report will say so clearly — and explain why. If the five-test TDG Programme is likely to be useful for your situation, I’ll say that honestly. There’s no obligation, and the audit cost is credited against any programme booked within 60 days.

Your blood results.Actually explained.

Your doctor said they were normal.That’s not the same as fine.

A written clinical report.Not a printout with arrows.

Four steps. Seven working days.No appointment needed.

The same results.A completely different picture.