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Bryan Johnson shares insights on biological age, healthy living, and ...
The tech entrepreneur and longevity enthusiast shares his thoughts on aging well and how founders should optimize for a work life balance.
Biological age tests: what they measure and how to use them
When we talk about age, we usually mean birthdays. Chronological age is easy to count, but it does not describe equally well how the body is functioning on the inside. That is why there is growing interest in so called biological age: an attempt to estimate how much wear and tear we have accumulated based on habits, environment, and overall health. In clinical settings, many professionals form a quick impression the moment they see someone. Sometimes it matches what you would expect for the person’s age and sometimes it does not. That gap can change the level of concern because it summarizes visible and subtle signals. Biological age tests try to turn that intuition into a number. What a biological age test is Most consumer biological age tests are built on a core idea: certain patterns of DNA methylation change over time. Methylation does not change your genetic code, but it can influence which instructions are read and which are skipped. You can think of DNA as a huge library and methyl tags as notes that alter what pages cells access more often. In practice, these tests take a sample, often blood, and measure epigenetic marks at specific sites. A statistical model then outputs an estimate of biological age. There are different clocks trained for different endpoints. Some are tuned to reflect mortality risk or disease associations, while others incorporate indirect signals linked to cardiovascular health and fitness. What it can add and what it cannot A biological age result can be useful as a trend summary. If it comes back higher than expected, it does not mean you are about to get sick, but it may suggest that important variables have been off track for a while. In that sense, it often behaves like a lagging indicator: it reflects what has been happening, not a precise forecast. It can also be a behavior lever. For some people, seeing a concrete number increases motivation to improve sleep, physical activity, nutrition, and stress management. If the test helps drive sustainable actions, that is its main value. What you should avoid is treating biological age as a substitute for fundamentals. We already have markers with established guidelines and well studied clinical decisions. Resting blood pressure, lipids, glucose related measures, body composition, and cardiorespiratory fitness often provide more actionable information than a single epigenetic number. Key limitations to keep in mind Before you spend money, it helps to be clear about several limit...
Publications Authored by IOA Division Leaders | Institute on Aging
Biological age acceleration in Alzheimer's disease modulates relative cortical to medial temporal lobe neurodegeneration. ... USA. 2025 May;36(5):855-863 ...
Bryan Johnson shares a quick biological age test | Watch - MSN
Bryan Johnson shared a simple longevity test at a Business Insider event. Grocery store law to change for millions of Americans Police identify suspect who killed eight kids, most believed to be ...
