Reading your results
What each number means, which ones to care about, and what to do next.
Your Delta
Your Delta is your biological age minus your chronological age. Negative means your cells are running younger than your birthday suggests; positive means the reverse.
Resist reading too much into a small Delta. A gap of a year or two sits within the normal range of measurement, and it is the trend across repeat tests that carries the real signal.
Pace of aging
If biological age is your odometer, pace of aging is your speedometer. A value near 1.0 means you are accruing roughly one biological year per calendar year. Below 1.0 means you are accruing them more slowly.
This is often the more actionable number, because it responds faster than biological age does. Your odometer reading cannot fall much; your speed can change this year.
The supporting markers
Depending on the test you ordered, your report may also include telomere length, immune cell proportions, and system-by-system ages.
- Telomere length — the protective caps on your chromosomes, estimated from methylation
- Immune cell subsets — the mix of cell types in your sample, which shifts with age and inflammation
- System ages — where an overall Delta is coming from, organ system by organ system
What to do with it
The interventions with the best evidence behind them are unglamorous and familiar: sleep, consistent movement including resistance training, not smoking, moderate alcohol, and a diet you can actually sustain.
Test again in six to twelve months. Testing sooner mostly measures noise; testing on a consistent schedule measures you.
Share the report with your doctor if anything concerns you. It is a wellness measurement and is not intended to diagnose, treat, cure, or prevent any disease.