How old is your body
really?

Your DNA sequence is fixed from birth. What changes through life is how your genes are expressed, and epigenetics is the study of those changes that happen without altering the underlying DNA. DNA methylation is the main mechanism these tests read: a methyl group attaches to specific sites on the DNA and influences how genes are expressed. These patterns shift in fairly predictable ways with age, and they're also influenced by lifestyle, environment, stress, diet and exercise. By reading a large number of these sites at once, the test estimates a biological age that a standard blood panel can't.

Two people born the same year can have quite different biological ages, because how you've lived shows up at the cellular level. That's the appeal of an epigenetic test: it gives you a measurable baseline rather than a guess, and because lifestyle influences these markers, it's something you can re-measure over time to see whether changes you've made are moving the needle. We'll let the research and TruDiagnostic's own materials speak to what the numbers mean, rather than making health predictions for you.

Knowing your biological age is one thing. Knowing how fast you're ageing right now is arguably more useful. DunedinPACE is a measure of your current pace of ageing: for each calendar year that passes, roughly how many biological years is your body moving through? A score above 1.0 reads as ageing faster than a year per year, below 1.0 as slower. It's the metric most sensitive to recent lifestyle change, which is why people who track it tend to retest periodically.

The kit includes SYMPHONYAge, which estimates the biological age of 11 individual organ systems rather than a single overall number, including the brain, heart, liver, lungs, kidneys and immune system. Most people don't age uniformly, so one system can read older or younger than your overall figure. It's one of the more interesting parts of the report, and TruDiagnostic's dashboard breaks each system down for you.