Journal
Notes from a scientist reading DNA.
Plain-language writing on longevity and your DNA: what it can and cannot tell you, how to choose, and the genes and concepts behind your analysis. Written by hand, the way the analyses are. Informational and educational, never clinical.
- LimitsWhat the science can, and cannot, sayJune 19, 2026
Can a DNA test tell you how long you'll live?
Genetics shapes your odds, not your date. An honest look at what a DNA test can and cannot say about lifespan, and why a longevity score is a probability dressed up as a prediction.
Read - ChoosingHonest guides to the decisionsJune 19, 2026
Is a longevity DNA test worth it?
Worth depends on one thing: whether the result changes what you do. When a longevity DNA test is worth the money, when it is not, and why you are paying for the interpretation, not the raw data.
Read - UnderstandingGenes and concepts, in plain wordsJune 19, 2026
What is biological age, and is it really different from your age?
Biological age vs chronological age, what epigenetic clocks actually measure, and why reading your inherited DNA sequence is not the same as a biological age.
Read - LimitsWhat the science can, and cannot, sayJune 19, 2026
Are at-home DNA health tests accurate?
At-home DNA tests are accurate for what they read, but raw health-risk results carry false positives, and an array reads only a fraction of your genome. Why interpretation is the real difference.
Read - UnderstandingGenes and concepts, in plain wordsJune 19, 2026
What can your DNA actually tell you about your health?
A DNA test reads tendencies, not a diagnosis: how you age, what fuels you, how you respond, plus ancestry and traits. What your DNA can and cannot tell you about your health, framed honestly.
Read - ChoosingHonest guides to the decisionsJune 19, 2026
You have your raw DNA file. Now what?
You downloaded your 23andMe or whole-genome raw file. What it can and cannot tell you, the limits to know, and the honest options for turning data into meaning.
Read - UnderstandingGenes and concepts, in plain wordsJune 19, 2026
What do people who live to 100 have in common?
How do centenarians live so long? The Blue Zones pattern, the longevity genes like FOXO3 and APOE, and why behaviour, not DNA, carries most of the story.
Read - UnderstandingGenes and concepts, in plain wordsJune 19, 2026
Healthspan vs lifespan: why how you age matters more than how long
Lifespan counts your years; healthspan counts the good ones. Why how you age matters more than how long, the gap between the two, and how genetics informs healthspan as tendencies, not prediction.
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Your turn
Read about your own DNA, not the average.
The writing here is general. Your analysis is the opposite: one precision medicine analyst reads your DNA by hand and writes what it means for you.