Epigenetic Clocks Explained
Measuring your true age
Epigenetic clocks use methylation patterns at specific DNA sites to estimate biological age. The newest clocks are built to track rate of aging and health-outcome risk, not just chronological age.
Explore the clock generations
Tap each clock to learn its strengths.
This step is interactive - open the Thier app to try it.
Estimate the accuracy
How many years of error do modern epigenetic clocks typically have?
This step is interactive - open the Thier app to try it.
How to interpret your own clock result
Don't fixate on the absolute number. The ±2-3 year measurement noise plus first-generation clock biases mean a single test isn't a verdict. What matters is the TREND across multiple readings: if your DunedinPACE drops from 1.05 (aging slightly fast) to 0.95 (aging slightly slow) after 12 months of intervention, that's a real signal. Test once, intervene 6-12 months, retest. The differential is what tells you something.
Choosing a clock for YOUR question
Different clocks answer different questions. Tap each to see when to use it.
This step is interactive - open the Thier app to try it.
Key Takeaway
Epigenetic clocks are the most accurate measure of biological age. DunedinPACE is the gold standard for tracking whether interventions are actually slowing your aging.