The idea behind it
Dr. Dayan Goodenowe’s research career has centered on a single observation: the biochemical changes that precede disease show up in blood years before symptoms do. He calls that pre-symptomatic state a prodrome, and his argument is that if you can measure it, you can act on it while it is still reversible.
ProdromeScan is the practical expression of that idea. Rather than testing for one marker at a time, it measures a coordinated panel across several body systems at once — membrane phospholipids, fatty acid composition, gut-derived metabolites, methylation, mitochondrial function, peroxisomal function, cholesterol transport, and inflammation — and presents them together so they can be read in relation to one another.
That last part is the point. In Dr. Goodenowe’s training materials for practitioners, he stresses repeatedly that no single marker on the report means anything on its own. The value is in how the systems balance against each other.
What it is not
This is worth stating plainly, because it is the most common misunderstanding — and because Dr. Goodenowe says it himself, first, before anything else:
ProdromeScan does not diagnose cancer, dementia, or any other disease, and it is not used that way. It also is not, in his words, a point-by-point shopping list — the report does not work like a vitamin panel where a low number generates a matching supplement. He is explicit that the core work of restoring human biochemistry is broadly the same for everyone, and that the report’s job is to show where an individual has drifted from it, not to replace clinical judgment about the person sitting in front of you.
The three questions a report answers
Dr. Goodenowe describes the report as a thirty-thousand-foot view, structured around three questions asked in order. For a practitioner who knows the panel, reading one should take a couple of minutes — the most common mistake, he says, is over-interpreting it.
How the panel is structured
- Is anything dramatically out of place? The first pass looks for a value high or low enough to indicate that one part of the system is not functioning properly — what he calls looking for the boogeyman under the bed.
- How is each system balancing internally? The body is constantly working toward equilibrium. Within a given system, the markers should sit in a particular relationship to each other — and when they do not, that relationship itself is the finding.
- How do the systems compare to one another? The final pass connects them. A pattern in one system frequently explains a pattern in another, and the interpretation comes from the connections rather than from any single line.
What it looks at
The panel is organized into sections, each included for a specific reason and built from what Dr. Goodenowe describes as decades of data across tens of thousands of individuals. At a high level:
Membrane phospholipids
The structural material that compartmentalizes every cell — separating one organ from another, and inside each cell, one organelle from the next. Includes plasmalogens, which the body must manufacture rather than obtain from food.
Membrane quality
Not just how much membrane material is present, but what it is made of. Fatty acid composition determines membrane fluidity, and determines whether an inflammatory event resolves or escalates.
Gut-derived metabolites
Long-chain molecules produced by the gut microbiome and absorbed into the bloodstream, associated in Dr. Goodenowe’s research with anti-inflammatory activity.
Methylation
The methyltransferase system, which the body uses constantly for cellular maintenance and repair. Read across several markers together rather than from homocysteine alone.
Mitochondrial function
Whether the cell’s furnaces are burning fuel completely. When they are not, the unprocessed fuel has to go somewhere — and where it goes is measurable.
Peroxisomal function
The organelles where plasmalogens are made, assessed alongside fasting triglycerides as an indicator of how well the body cycles between fed and fasting states.
Cholesterol transport
Total cholesterol and HDL, read as an indicator of cellular energy status and export capacity rather than purely as cardiovascular risk numbers.
Inflammation & basic nutrients
C-reactive protein, iron, and related markers — the general bellwethers that give context to everything else on the panel.
Why a practitioner reads it with you
Interpretation of ProdromeScan is taught to clinicians, and that is deliberate. The reason is not that the information is secret — it is that the report is genuinely relational, and a number read in isolation will mislead you.
Two examples from Dr. Goodenowe’s own training illustrate why. A marker most people assume is straightforwardly “lower is better” can be low for two opposite reasons — one benign, one indicating the system is barely functioning — and telling those apart requires looking at three other sections. Elsewhere, a marker conventionally used to assess kidney clearance carries entirely different meaning when read for health rather than for disease, and the direction that worries a practitioner is the opposite of the one most people watch.
He is equally clear that the report never overrides the person. “Nothing here should ever override an individual.” A blood sample is a blood sample; it is not a piece of someone’s brain. If a person has a known condition, that reality governs the plan regardless of how the panel reads.
What the process looks like
Practical expectations
- Fast beforehand, but keep your routine. A twelve-hour fast before the draw is standard. Dr. Goodenowe is emphatic that you should not stop your usual supplements first — the point of the test is to see how your current regimen is actually working for you.
- The first report is a starting position. It establishes where you are and what the initial priorities should be.
- A follow-up at three to four months. Long enough for changes to register, and the point at which a protocol usually gets its final adjustments.
- Then annually. Once biochemistry is in a good working range, he argues it is not hard to keep it there. An annual check confirms nothing unexpected has happened.
- It is meant to reduce anxiety, not create it. He is pointed about this: the goal is not a test you anxiously repeat every few months to see whether you are dying. It is a way to stop wondering.
Why this matters for root-cause medicine
The reason ProdromeScan sits at the center of this approach rather than at the edge of it is that restoration without measurement is guesswork. If the premise is that disease is preceded by a measurable biochemical drift, then the measurement is not an accessory to the work — it is what makes the work possible, and what makes progress visible to the person doing it.
Dr. Goodenowe frames the underlying logic in a way that is worth sitting with:
That is the claim the panel is built to test — that health is not a vague aspiration but a describable biochemical state, that deviation from it can be measured, and that most of what is measured is modifiable through diet, lifestyle, and targeted supplementation.
A note on interpretation
We have deliberately not published reference ranges, thresholds, or interpretation rules on this page. That detail is taught to practitioners for a reason: on this panel, the same number can mean opposite things depending on what the rest of the report says, and a self-read is more likely to produce false alarm or false reassurance than insight.
If you want to know what your own biochemistry looks like, the route is through a practitioner trained to read it — who will also weigh it against your history, medications, and circumstances in a way no reference range can.