Article
The Clocks Explained: What OMICmAge, Symphony Age, and DunedinPACE Are Actually Measuring
"My SYMPHONY Age is 42, but my DunedinPACE is above 1.0 — am I aging faster?" The clocks aren't measuring the same thing. Here's what each one is actually telling you.
The Clocks Explained: What OMICmAge, SYMPHONY Age, and DunedinPACE Are Actually Measuring
When patients first see their TruAge results, one common reaction is to want more information about what different clocks are measuring and why they can diverge.
"My SYMPHONY Age is 42, but my DunedinPACE is above 1.0. Does that mean I'm aging faster than I think?"
"Why is my OMICmAge different from my SYMPHONY Age?"
These are good questions. The short answer: the clocks aren't measuring the same thing. They're measuring different dimensions of biological aging, and each one tells you something the others can't.
Start with the analogy
Think of a car. You can describe how it's aging in several different ways:
None of these measurements contradict each other. A car can have low mileage but be moving very fast. Or high mileage and coasting. The odometer and speedometer describe different aspects of the same system.
The biological age clocks work the same way.
OMICmAge — the odometer
OMICmAge is the overall biological age estimate in TruAge. It is a methylation-based clock trained against multi-omic health data — including clinical labs, metabolites, and proteins — to estimate how old the body is functioning relative to chronological age.
If a 50-year-old patient has an OMICmAge of 44, the simplest interpretation is that their overall biological profile looks younger than expected for their chronological age. If their OMICmAge is 58, their overall biological profile looks older than expected.
What drives it: Broad, whole-body biological signal. OMICmAge is intended to summarize overall biological aging using a multi-omic reference framework, rather than focusing on one organ system or one isolated biomarker.
What it's useful for: Patient-facing biological age, overall aging status, longitudinal tracking, and a simple summary metric that helps orient the rest of the report. It answers the high-level question: How old does this patient's biology appear overall?
What to keep in mind: OMICmAge is a composite "whole-body" age. It does not tell you which system is driving the result by itself. That is where SYMPHONY Age and the TruHealth EBPs become important.
SYMPHONY Age — the system map
SYMPHONY Age breaks biological aging into organ and system-level patterns. Instead of giving only one overall number, it shows where aging appears to be concentrated across systems like immune, metabolic, inflammatory, liver, hormone, musculoskeletal, and others.
This makes SYMPHONY Age especially useful when the overall age number does not tell the whole story. A patient may have a relatively favorable OMICmAge but show acceleration in a specific system. Or they may have an elevated OMICmAge with SYMPHONY Age pointing toward the systems most likely contributing to that result.
What drives it: System-specific methylation patterns associated with biological aging across different tissues and functions.
What it's useful for: Explaining the "where" behind biological aging. SYMPHONY Age helps clinicians move from a single age number to a more targeted interpretation: which systems look older, which look younger, and where follow-up may be most useful.
What to keep in mind: SYMPHONY Age is not meant to replace OMICmAge. It adds resolution. OMICmAge gives the overall readout; SYMPHONY Age helps explain how that aging signal is distributed across the body.
DunedinPACE — the speedometer
DunedinPACE measures something different: the current pace of biological aging. Not how old the epigenome looks, but how fast it's currently changing.
It's calibrated so that 1.0 represents the average aging pace in a reference population. A score of 0.85 means a patient is aging at 85% of average pace. A score of 1.15 means they're aging 15% faster than average.
DunedinPACE was developed using longitudinal data — tracking the same individuals over time and measuring how quickly their methylation patterns shifted. This makes it uniquely sensitive to current physiological state: recent stress, sleep disruption, dietary changes, illness, or the beginning of an effective intervention.
What it's useful for: Intervention tracking. If a patient makes meaningful lifestyle changes or starts a new treatment protocol, DunedinPACE may show a response before the age-based clocks shift. It's the early signal.
When the clocks disagree — and why that's informative
The clocks are designed to capture different dimensions of aging, so disagreement between them is expected. The goal is not to force them into the same answer; it is to understand what each pattern is telling you.
Younger OMICmAge + elevated DunedinPACE
The patient's overall biological age may look favorable, but their current pace of aging appears elevated. This can happen when a recent or ongoing stressor is affecting the body before it has meaningfully changed the broader biological age estimate. Consider recent illness, poor sleep, major stress, medication changes, training load, or other new physiological strain.
Older OMICmAge + normal or improving DunedinPACE
The patient may still be carrying the legacy of earlier biological aging, but their current trajectory may be stabilizing or improving. This can be an encouraging pattern, especially after lifestyle changes or a new intervention, even if the overall biological age number has not fully shifted yet.
OMICmAge and SYMPHONY Age point in different directions
The overall age estimate may look favorable while one or more systems appear older, or the overall estimate may be elevated while SYMPHONY Age helps identify which systems are contributing most. This is where the system-level view adds value: it helps explain where the aging signal is concentrated.
When a patient asks, "Which one is the real answer?" the answer is that each clock is describing a different layer of the same biology. The differences are often what tell you where to focus next.
From clocks to action — where TruHealth comes in
The clocks tell you the what: overall biological age, system-level aging, and current pace of aging. TruHealth tells you the why and the what next.
A common workflow: a patient comes in with an elevated OMICmAge and a DunedinPACE above 1.0. You want to understand what's driving that picture. First, look at SYMPHONY Age to see whether specific systems are contributing to the pattern. Then open TruHealth and review which EBP categories are flagged — metabolic, inflammatory, mitochondrial, toxin, immune, or hormone-related. Those flagged EBPs are the biological levers likely contributing to the clock readings, and they're your clinical action items.
The clocks set the context. The EBPs give you the handles.