Biological age tests from 40: what the description says
The description presents three ways to estimate biological age: epigenetic clocks, blood-based markers and telomere tests. It calls GrimAge most accurate for predicting lifespan and telomere tests weakest as a single value. [1]
Automatic summary · not editorially reviewed
The key findings
The description says chronological and biological age can differ by 10–15 years. [1]
The description lists epigenetic clocks, blood-based markers and telomere tests as measurement routes. [1]
The description calls GrimAge most accurate for lifespan prediction and telomere tests weakest as a single value. [1]
The source at a glance
- Study type / format
- Video description
- Population / context
- People interested in measuring biological age, addressed in the video description
- Summary based on
- Creator description
- Original publication
- June 10, 2026
Chronological versus biological age in the description
The creator, a Swiss performance coach, says chronological age is the years since birth, while biological age describes the state of your cells and how fast you really age. According to the description, the two can differ by 10–15 years. The description does not explain how that range was determined.
Supporting source [1]
Three measurement routes and their stated costs
The description names three routes: epigenetic clocks based on DNA methylation, such as GrimAge and DunedinPACE; blood-based markers, with PhenoAge estimated from a standard blood count; and telomere tests. It gives costs of about 250–500 Swiss francs for epigenetic tests and 150–400 for telomere tests, while a PhenoAge estimate from a normal blood count is described as almost free.
Supporting source [1]
Which test the description ranks strongest
For predicting lifespan, the description says GrimAge is considered the most accurate, while DunedinPACE measures the pace of aging. Telomere tests are called the weakest as a single value. These are the creator's statements in the description; the description does not report study designs, sample sizes or uncertainty for these rankings.
Supporting source [1]
How to interpret this
This explains only the video description. The video and transcript were not reviewed, and the description reports no study designs, sample sizes or uncertainty for its rankings. It is not medical advice.
Based on the creator’s description; the full video and transcript were not analyzed.
Source & supporting passages
@LongevityPerformance · youtube.com · June 10, 2026