The Correction
The book describes the right method
with the labels the wrong way round.
What has not changed is the order of work. Page 140 gives it: where the questionnaire and the tests disagree, you work from what the tests show now, and you re-check the questionnaire once the blocking factors clear. That is still exactly how the method runs. If you have followed the book in practice, you have been doing this part right.
What has changed is the explanation of what each instrument is measuring. The book says the questionnaire measures your current functional expression and the functional tests reveal the constitutional type underneath. That is the wrong way round. The questionnaire is the closest available proxy for a long-standing pattern — a starting hypothesis, not a measurement. The tests describe what your biochemistry is doing now. Where the two disagree, current function governs the protocol until the constraint clears.
Why the change. Chapter 7 of the book already makes the argument. Sustained HPA axis dysfunction produces sympathetic indicators on both the questionnaire and the functional tests. If prolonged stress can distort the tests as well, the tests cannot be a clear window onto constitution. Chapter 7 was right; the rest of the book used the older labels.
The one place this changes what you would actually do. Mechanism One, pages 175 to 177, deals with a client whose questionnaire reads sympathetic because of sustained stress, and tells the practitioner to use the constitutional dietary protocol "rather than the functional expression diet." The method now does the reverse: guidance follows the current constraint until it clears. It is the only one of the passages below that attaches an instruction to the older labels, so it is named here rather than left in a list.
For anyone checking against the book. An earlier version of this note named only Chapter 6. A search of the full text found the older labels in seven places across three chapters. Page numbers are the book's own:
Where the older labels appear. Page numbers are the book's own.
| Page | Chapter | What it says |
|---|
| 127 | 4 — Questionnaire | "The functional test subsequently reveals the truth." |
| 140 | 4 — Questionnaire | Where the two disagree, the tests' reading "takes precedence for immediate clinical intervention"; the questionnaire is re-administered once blocking factors resolve. The order is right; the labels are not. |
| 172 | 6 | "the questionnaire is measuring the current functional expression … the functional tests are revealing the constitutional type beneath it." |
| 175–177 | 6 — Mechanism One | The same, with an instruction attached: use the constitutional protocol "rather than the functional expression diet." |
| 178 | 6 — Mechanism Two | "The blood chemistry reveals the truth." |
| 182 | 6 — worked case | "The slow blood chemistry beneath the sympathetic symptoms reveals the constitutional Grounded type" — then implements the Grounded protocol. |
| 271 | 9 — Body Awareness | "The functional tests provide objective evidence of constitutional type that does not depend on the client's self-report." |
Four of the seven sit inside Chapter 6, whose subject is exactly this question, so that is where the position is argued. The other three show it was the book's working assumption rather than one chapter's argument, which is why the whole note applies to the whole book.
A fourth edition is not currently planned. Until one is published, this site is authoritative where it and the book disagree, and corrections are posted here with the date they were made.
"Anyone holding the book can turn to all seven pages and check. A correction you have to take on trust is not a correction."
Also Being Corrected
What is changing
on the website
These changes are being made across the Metabolic Natures pages. Each page shows the date it was updated. A page without that date has not been updated yet and may still show what is described below — treat this note as the authority until it has.
1. The six names are positions on two axes, not six kinds of person
The site has presented six discrete types, each with a code, and assigned you one of them. It is moving to report both axes, always — each as a direction and a strength, in the fixed order oxidative first and autonomic second. The oxidative reading sets the food framework; the autonomic reading adjusts the carbohydrate share within it and never sets it on its own. The thresholds that decide where a reading is named, and when it is too weak or too sparse to rely on, are judgement rather than evidence, and the method states them as such.
Why. Reporting only the stronger of the two axes means that when the two are close, a one-point change to a single questionnaire answer flips the reported result — and a flipped result means a different food guide. Under simulation with uniformly random answers, a single one-point change moved the reported Nature in around 40% of cases and moved it across axes entirely in around 20%. Real answers are correlated, so the true rate is lower, but the structural problem does not depend on the simulation: comparing two continuous magnitudes with no dead zone makes near-ties unavoidable, and a near-tie is a coin flip. Showing both numbers removes the flip instead of hiding it.
Endurance, Adaptive and Catalyst are the three oxidative positions. Grounded, Calibrated and Kinetic are the three autonomic ones. The vocabulary in the book is unchanged; what changed is that a name is now a position with a direction and a strength, rather than an identity.
2. The calcium:phosphorus ratio comes out
It reached this framework through hair tissue mineral analysis. In HTMA it is a hair measure read as an autonomic ratio, with around 2.6 taught as ideal and a high ratio taken to indicate parasympathetic dominance. The site had it as a serum marker of fast oxidation above 2.5:1 — wrong specimen, wrong axis, wrong direction, and a threshold sitting closer to the middle of the range than to either edge, which would have classified roughly everyone above average as a fast oxidiser.
It has never been tested against macronutrient response in any case, and the underlying measurement has a reproducibility problem that comes before any question of interpretation: in 2001 JAMA published a study in which one hair sample, split between the six commercial laboratories handling most US samples, returned between-laboratory differences exceeding tenfold for twelve minerals, with nearly every mineral classified high, normal or low differently depending on the lab. Seidel et al., JAMA 2001;285(1):67–72.
There is a fair objection that laboratories differ on washing protocol and sampling site, and that this explains some of the variance. It does — and it makes the interpretive problem worse rather than better, because it means a threshold is specific to one laboratory's protocol and is not transferable to another lab, let alone to blood.
3. The eosinophil:basophil pattern comes out
Presented as an autonomic indicator. A PubMed search on 7 September 2026 for eosinophil and basophil with ratio and autonomic, sympathetic or parasympathetic returned four papers, none of which uses an eosinophil:basophil ratio as an index of anything. Scope stated so it can be challenged: PubMed only, English-language indexing. A claim can exist outside PubMed — but a claim presented as established that returns nothing in the principal biomedical index under any framing tried is not established.
4. "Test-confirmed" comes out, and so does the genetic-baseline claim
The sales page has been headed Six Types. One Framework. Test-Confirmed. No test confirms an axis position, because no test has been validated against one. The tests describe current function — which is useful, and which changes protocols, but is not confirmation.
A section also stated that SNPs governing oxidative phosphorylation and beta-oxidation establish a constitutional baseline. No SNP panel has been tested against oxidative or autonomic position, none is used here, and the claim is being removed rather than softened.
5. What counts as the constraint clearing is stated
"Current function governs until the constraint clears" only means something if clearing is checkable. The markers that define the constraint are named in advance, in writing, before the protocol starts, with the expected change and the timeframe. They are retested. Four outcomes are possible, and all four are recorded: the constraint clears and the picture shifts as predicted; the constraint does not clear; the plan was not followed, which is recorded as untested rather than failed; or the constraint clears and the expected shift does not happen. That last outcome is the one that counts against the reading, and two cycles of it mean reconsidering the reading rather than adding another intervention.
Updated 4 October 2026. This note, and two of the Metabolic Natures articles, listed three outcomes. The method has four: “the plan was not followed” was missing, and without it a plan nobody followed could be counted as the method failing. All three places now list four.
6. Protein comes off the oxidative axis — 25 September 2026
Earlier versions of these pages said the fast end of the oxidative axis leans toward more protein and fat. Protein is now set separately, by body weight — usually 1.2–1.6 g per kg a day, never below 0.8 g/kg (1.0 g/kg from age 65), with 2.2 g/kg as the working ceiling — and it is the same whichever position you hold. The oxidative reading now sets only the balance of starch and fat, as three carbohydrate bands: 20–30%, 30–50% and 50–60% of energy.
Why. A fixed percentage of energy from protein quietly set intakes above what the evidence supports for some people — 35% of a 2,000 kcal day is about 2.3 g/kg for a 75 kg adult. Protein needs are set by body weight, age and training, and the evidence for them (expert consensus and a meta-analysis of 49 trials) says nothing about oxidative position.
7. The book is not on sale — 4 October 2026
Several pages on this site said Metabolic Natures was available on Amazon “in paperback and Kindle”, and one called the method in the printed editions “unchanged”. Both were wrong. The book was only ever a paperback, it has been withdrawn while it is rewritten to the current method, and the method has changed in more than the seven places listed above. The books page also still described the book as “test-confirmed”, which point 4 retracted. Those notices have been removed or rewritten, and the “Get the Book” buttons, which in fact led to a different book in the series, have been replaced. Metabolic Natures programme clients receive Volume 1 when it is complete.
8. The marker table loses its oxidative directions — 4 October 2026
The article on test markers listed six blood markers (CO2, total protein, triglycerides, HDL, fasting glucose and uric acid), each with a “faster-oxidative” and a “slower-oxidative” direction. The text around the table already said the markers describe current function, not type, but a table laid out by oxidative rate still read as a key for assigning one. The directions came from the metabolic typing tradition and were never tested against oxidative rate or against outcomes. They have been removed. The table now says what each marker describes.