Prevent51 Biological Age Testing

What is Biological Age Testing?

Your biological age reflects how well your body is functioning compared to your actual (chronological) age. Biological ageing tests help us understand how your body is ageing beneath the surface, so we can target changes that support your long-term health.

We offer two different biological ageing tests. Both are scientifically validated, but they measure different aspects of ageing. This guide explains them in simple terms to help you decide which is right for you.

All packages include a 1:1 appointment with one of our doctors. We will explain your results clearly and help you turn them into practical, achievable actions.

1. GlycanAge

In simple terms

GlycanAge looks at how inflammatory your immune system is behaving. As we get older, the immune system often becomes slightly more inflammatory. This low-level inflammation (sometimes called 'inflammaging') is linked to heart disease, metabolic problems, cognitive decline and musculoskeletal ageing.

What the test measures

It analyses sugar molecules (called glycans) attached to an immune protein in your blood. These molecules influence how inflammatory or anti-inflammatory your immune system behaves.

What you receive

·       Your immune biological age (how old your immune system appears to be)

·       An indication of your inflammatory burden

·       Insight into whether lifestyle factors may be accelerating ageing

Why this test is useful

·       It can change with lifestyle and medical treatment

·       It is suitable for repeat testing to track progress

·       It has a clear, visual report that is easy to understand

·       Results available in approximately 3 weeks

GlycanAge may suit you if:

·       You want a practical test that reflects inflammation

·       You want to monitor progress over time

·       You prefer a simpler, clearer report

·       You would like faster results

2. GrimAge (Epigenetic Test)

In simple terms

GrimAge looks at how your DNA has changed over time. These changes reflect the cumulative impact of ageing, stress, environment and lifestyle. It gives a broader 'whole body' estimate of biological age.

What the test measures

It examines DNA methylation patterns — small chemical markers on your DNA that shift gradually as we age.

What you receive

·       Your overall biological age estimate

·       Insight into longer-term health risk patterns (heart, metabolic, brain)

·       A broader picture of systemic ageing

Why this test is useful

·       It is one of the most research-validated epigenetic ageing clocks

·       It provides a strategic baseline measure

·       It is best used as a longer-term benchmark rather than frequent tracking

·       Results available in approximately 6 weeks

·       The report is more technical and requires clinician interpretation

GrimAge may suit you if:

·       You want a big-picture biological age estimate

·       You are interested in long-term longevity benchmarking

·       You are comfortable reviewing results with clinician support

Key Differences at a glance:

  • GlycanAge:
    Immune System Inflammation

    GrimAge:
    DNA ageing patterns

  • GlycanAge:
    Inflammation & immune ageing

    GrimAge:
    Whole-body biological age

  • GlycanAge:
    Monitoring progress

    GrimAge:
    One-off baseline benchmark

  • GlycanAge:
    Changes relatively quickly

    GrimAge:
    Changes slowly

  • GlycanAge:
    About 3 weeks

    GrimAge:
    About 6 weeks

Which should I choose?

There is no 'better' test — they simply answer different questions.

Choose GlycanAge if you want something practical and trackable.

Choose GrimAge if you want a broader, strategic overview of biological ageing.

If you are unsure, we will guide you based on your Prevent51 goals and health priorities.

Biological age testing is not about chasing a number. It is about understanding processes that may be modifiable and relevant to achieving your long-term health vision.