Hi,

You’re investing in your health - better food, smarter workouts, personalized supplements, sleep tracking.

But here’s the question nobody’s asking:

How do you know if any of it is actually working?

You can’t feel your telomeres lengthening. You can’t sense your methylation patterns improving.
If you're serious about longevity, you need real data - not just guesses.

Last week, we explained why biological age matters more than the number on your driver’s license.
This week: how to actually measure it - and what to do with the results.

^{If you only do ONE test: make it epigenetic}

DNA methylation testing is the current gold standard for measuring biological age.
It tracks chemical tags on your DNA that regulate gene expression - and shifts in these patterns reflect how fast your body is aging.

The best option right now? TrueDiagnostic - one of the most comprehensive and science-backed tests available.

Unlike simpler tests that only use the Horvath clock, TrueDiagnostic analyzes multiple advanced aging clocks:

• GrimAge (predicts disease risk and mortality)

• PhenoAge (captures system-wide dysfunction)

• DunedinPACE (shows how fast you're aging right now)

The result? A deep, multi-dimensional view of your biological age - and how to improve it.

It’s an at-home blood test, CLIA-certified, with reports designed for both practitioners and proactive individuals.

Starting at $229 - about what you'd spend on a month of boutique supplements.

→ Stop guessing. Get your real age here

^{Want more data? Add these blood markers}

Some TrueDiagnostic panels include markers like inflammation and metabolic age.
But if you're working with a doctor or running your own labs, these are worth checking:

Inflammation

• hs-CRP

• IL-6

• TNF-α

Metabolic health

• Fasting insulin

• HbA1c

• Triglycerides

• ApoB

Hormones & organ function

• DHEA-S

• IGF-1

• ALT, AST

• Creatinine, GFR

These won’t give you a single biological age number, but they reveal where systems are under stress - and where aging is accelerating.

^{Track your progress over time}

The most valuable insight isn’t your baseline - it’s your trend.

Re-test every 6-12 months to see whether your interventions are actually slowing your aging.

TrueDiagnostic includes Pace of Aging, a scientifically validated score:

• Below 1.0 = aging slower than average

• 1.0 = aging at average pace

• Above 1.0 = aging faster

It’s one of the only tools that shows if your longevity strategy is actually working.

^{What if the results aren’t what you hoped?}

A common concern:
“What if my biological age is older than my real age?”

Good. That’s actionable data.
It tells you where to start - and what to fix.

Unlike your birth date, your biological age is negotiable - you can change it.

And now, you’ll have the metrics to prove it.

^{Bonus: The tests that cost $0 and predict mortality just as well}

Some of the best longevity indicators don’t require a lab.

Track these regularly:

• Grip strength

• Walking speed

• VO₂ max

• Resting heart rate

• Heart rate variability (HRV)

They’re easy to measure - and in many studies, outperform blood tests in predicting long-term health.

^{Bottom line}

Don’t guess. Measure. Adjust. Improve.

Biological age testing is one of the most powerful tools for anyone serious about aging better, living longer, and optimizing their health strategy.

→ Get your biological age tested-see where you actually stand

Want more science-backed longevity tips?

Next Week:
We’ll explore what actually slows aging - rapamycin, red light therapy, precision fasting, and how to know what’s worth your time (and money).

Stay curious,
David
Founder, Longevity Enthusiasts

Disclaimer: This newsletter is for educational purposes only. It is not medical advice and should not replace consultation with a qualified healthcare professional.

Affiliate Disclosure: Some links in this newsletter are affiliate links, which means I may earn a small commission if you decide to make a purchase. This comes at no extra cost to you - and I only recommend products I genuinely believe in and have vetted through research.