My Longevity Journey

Blood, Biomarkers, and Beach Miles

Published

4 months ago

January 16, 2026

An eighteen hour fast, fifteen vials at Quest Diagnostics, a brave little finger prick at home, and two runs that turned a science day into a victory lap.

Today, I turned my body into a friendly neighborhood research lab. Two blood tests, one long fast, a slightly dramatic amount of vials, and enough running to make my future self very proud. If you’ve ever wondered what it feels like to chase biomarkers in the morning and chase endorphins by sunset, welcome to my day.

Mission One: Function Health at Quest Diagnostics

I kicked off the morning fasted for about 18 hours and headed to Quest Diagnostics for my Function Health labs. According to the Function Health site, I expected around 10 to 12 vials.

The technician had other plans.

15 vials later, I’m sitting there thinking, wow, that is a lot of little tubes for one human. The whole process was quick and smooth, though. It started with a urine sample, then the blood draw. Unlike the Blueprint Advanced Panel I did a year ago at Lab Corp, this time they didn’t use a butterfly needle, which makes it feel like one clean, easy poke. Nevertheless, the technician was gentle today and it took about 5 minutes for sample collection.

This panel is supposed to cover a huge spread of categories, including autoimmunity, blood, electrolytes, male health and hormones, heart health, heavy metals, immune regulation, kidney, liver, metabolic, nutrients, pancreas, stress and aging, thyroid, and urine. Very similar to the Blueprint Advanced Panel, but not entirely the same.

I grabbed this test for $365 on Black Friday (referral link), and I also bought it for my whole family as a kind of health snapshot gift. Function says results show up in about four weeks. Based on my past experience with other testing, I’m secretly hoping I’ll start seeing some numbers pop up over the weekend!

Mission Two: Blueprint Speed of Aging test at home

*Blood sample from Blueprint Speed of Aging test.*

After Quest, I came home, broke the fast with oatmeal, and had green tea, plus a glass of electrolyte lemonade (yummy!). Then it was time for the at-home Blueprint Speed of Aging test developed by TruDiagnostics.

They ship a kit with everything you need. Two spring-loaded lancets, alcohol wipe, gauze, bandage, and the sample card where you blot your blood into a printed circle. In the photo above, you can see the card with that red circle filled in. It looks oddly official, like a tiny passport stamp from the land of longevity.

Before I left Quest, I asked the technician which finger gives the best blood flow, because last time I did this I had to poke my finger twice and that wasn’t fun! She recommended the side of the ring finger and told me to make sure my hands were warm.

Armed with that advice, I set up my little station on the counter, swabbed my ring finger, got the card ready, and stared at the lancet like it was a tiny plastic jack-in-the-box.

I will say this with confidence. I much prefer someone else drawing blood from my arm over me pressing a spring-loaded button and waiting for the pop. The anticipation is genuinely the scariest part. It’s like your nervous system knows what’s coming and politely requests an alternative plan.

Pop.

Blood started flowing. I wiped the first bit with gauze, then got to work blotting the card until the circle was mostly filled and it started showing through the other side. I snapped a photo, which captures the moment pretty good. Blood on my fingertip and the kit scattered around like a miniature crime scene, except the suspect is me and the motive is better data.

After that, it’s now a waiting game. I let the card dry for three hours, sealed it in the biohazard bag, and packed it into the envelope to mail back to the lab.

This is the test I’m most excited about. I expect my broader labs to be pretty consistent with the WHOOP Advanced Labs I did at the end of last year. But the Speed of Aging number is the one I’m watching like a hawk. In January of 2025, it came back at 29.1 years old, about fifteen years younger than my chronological age. Since then, I’ve drastically changed my diet, exercise, and sleep, so I’m eager to see whether that number holds, improves, or humbles me. As of today, my WHOOP Age stands at 30.8 years old with a pace of aging of 0.70.

The Victory Lap: Training to Celebrate the Data

Once the science portion of the day was handled, I did what I love most. I moved.

First, a 4 mile run on the treadmill in the gym, about 30 minutes, just in case I passed out from the blood work I’d be close to home! I spent about 15 minutes in Zone 4 with an incline of 4.0 and a pace of 7.8 MPH. Then I refueled with my spinach protein smoothie with olive oil, plus about 3 cups of broccoli, cauliflower, and carrots.

After that, I headed out for a 6.4 mile run along the coast, letting the ocean air do what it always does, clear my head and smooth out the edges of the day. Next up is a little light lifting, dinner, and then the best kind of recovery combo, a sauna and a long soak in the jacuzzi. Data collected, miles logged, body cared for. That’s a good day! 🙌

🩺 Disclaimer

The content on I Won’t Die is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any health concerns.

🚀 Get Started with Blueprint

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My Longevity Journey

Electrolytes: The Small Habit That Quietly Changed My Recovery

Published

1 month ago

April 14, 2026

Sean Callahan

From lab data to daily routine, how one simple addition is improving hydration, HRV, and how I feel every morning.

I’ve tried a lot of electrolyte drinks over the years.

If you’ve ever run a 5K, 10K, half marathon, or marathon, you know the drill. There’s always a sponsor handing out cups along the course. Some are great. Some… you take one sip and immediately regret your life choices.

So I never really thought much about electrolytes beyond race day.

That changed after my labs.

What the Data Actually Said

After my WHOOP Advanced Labs last November, one small thing stood out.

Not a red flag. Not a major issue.

Just a signal.

My BUN and BUN to creatinine ratio were slightly elevated, which often points to mild dehydration or high protein load at the time of testing.

The interesting part is that I already drink a lot of water.

Usually over one hundred ounces a day.

Hydration has always been one of my stronger habits.

But the takeaway was simple.

Water alone is not always enough.

The Adjustment

I did not overhaul anything.

I made a small change.

Electrolytes.

I started adding one scoop of electrolyte powder to about 24 ounces of water each day. On harder training days, or after a sauna or jacuzzi session, I might have two or three.

That’s it.

No complexity. No big protocol.

Just consistency.

What I Noticed

This is where it got interesting.

My HRV started improving.

Not overnight, but steadily.

Recovery scores became more predictable. Morning readiness felt smoother. Less variability.

And one pattern stood out.

If I have a glass of electrolytes before bed, I often wake up with a green recovery on WHOOP.

Not always. But often enough to notice.

There is a tradeoff.

I also wake up at night to use the bathroom more.

Worth it.

The One I Landed On

After trying a few options and doing a bit of research, I landed on:

KEY NUTRIENTS Electrolytes Powder (available on Amazon)

What I like:

No sugar
Sweetened with stevia
No unnecessary additives
Clean ingredient profile
Easy to mix and drink

I started with lemonade and now rotate between:

Strawberry Lemonade
Pink Lemonade
Orange
Lemonade (again, still my favorite)

They also offer a range of other flavors and even unflavored options, which I may try next.

A 90 serving container usually runs around $40, but I’ve seen it closer to $25 when it goes on sale.

Why This Matters

It is about listening to small signals, not about adding another supplement to my daily routine.

My labs did not say “you have a problem.”

They said “there is an opportunity.”

Hydration is one of the fastest levers you can pull, and if your body is human like mine, you’ll feel the results right away!

It affects:

HRV
recovery
sleep quality
training output
how you feel when you wake up

And unlike most things, it responds quickly.

Final Thoughts

The biggest improvements in my health this past year have not come from dramatic changes.

They have come from small, consistent adjustments.

This is one of them.

Easy to implement. Easy to maintain. Quietly effective.

And once it becomes part of your routine, you don’t really think about it anymore.

You just feel the difference.

🩺 Disclaimer

🚀 Get Started with Blueprint

Start optimizing your health today with $25 off your first order! Use our referral code to begin your Blueprint journey and take control of your longevity.

🏋️‍♂️ Track Your Sleep, Workouts & Recovery

Boost your performance and recovery with Whoop. Join with my referral link to get a free WHOOP 5.0 and one month free!

📲 Download the I Won’t Die App

Stay ahead with the latest news, updates, and insights. Download the I Won’t Die app now on the Apple App Store and Google Play!

📩 Contact Us

Have tips, photos, or questions? Want to collaborate? Reach out at [email protected] — we’d love to hear from you!

🔗 Stay Connected

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My Longevity Journey

Mission Accomplished: My Speed of Aging Result Is In and Blueprint Confirms the Trend

Published

1 month ago

April 6, 2026

Sean Callahan

From 0.95 to 0.67 in a year, with WHOOP now showing 0.60, the signal is clear: steady habits are changing the trajectory.

A few weeks ago, I took another shot at the Blueprint Speed of Aging test due to a bad sample.

This time, it worked.

No failed sample. No retest request. Just a clean blood spot card, a little patience, and now a result I have been waiting to see.

And it’s a good one.

The Number

My new pace of aging came back at:

0.679503063641104

That means my body is aging at about 67% of the expected rate.

Put another way, for every calendar year that passes, my biology is aging closer to eight months.

What makes this result more meaningful is the trend.

In January 2025, my pace of aging came back at 0.95. Now, a little over a year later, it is 0.67.

That’s a real drop. Not a rounding error. Not wishful thinking. A real shift in the rate at which my body is aging.

Blueprint also says I am aging slower than 98.15 percent of people my age who have taken the same test.

What This Test Measures

The Blueprint Speed of Aging test is based on DNA methylation, which looks at how your cells are changing over time.

It’s a measurement of the rate at which your body is biologically aging at the cellular level, not a broad wellness score.

A score of:

1.0 means you are aging at a normal pace
below 1.0 means you are aging more slowly
above 1.0 means you are aging more quickly

So moving from 0.95 to 0.67 in a year is exactly the kind of direction I hoped to see.

A Second Signal From WHOOP

What makes this even more interesting is that my other aging data points tell a similar story.

As of this morning, my WHOOP pace of aging is 0.60.

Different system. Different inputs. Different model.

But the message is almost identical.

And to me that matters.

When independent tools start pointing in the same direction, the story becomes harder to ignore.

What Changed: Nothing Flashy

I have stayed consistent with the same core routine I built last year:

Mediterranean diet
Same supplements I started last year
Daily cardio, averaging about 7 miles of running per day
Strength training 4 to 5 days a week (down from 7)
Better recovery and sleep consistency

That last one matters more than most people think.

I did this without hacks, rather through repetition, day after day.

Why This Result Matters

The best part of this result isn’t the number itself, but the confirmation.

The work is landing.

The changes I made aren’t only improving how I feel or how I perform, but they are showing up in the biology underneath everything else.

That’s what I wanted to know.

The Bigger Picture

A year ago, I was focused on risk reduction of heart disease.

Lower inflammation.
Improve cholesterol.
Stabilize blood sugar.
Get healthier on paper and in practice.

Now the conversation is a little different. The question is no longer just whether I’m lowering risk, but whether I’m changing trajectory.

This result says yes.

Final Thoughts

Now this becomes the new benchmark.

The goal is simple:

Keep doing what works.
Stay consistent.
Protect recovery.
See if the number keeps moving in the right direction or plateaus.

For me, this wasn’t really about one test. It was about being on a better path.

And right now, the path looks better than it did a year ago. 🙌

🩺 Disclaimer

🚀 Get Started with Blueprint

Start optimizing your health today with $25 off your first order! Use our referral code to begin your Blueprint journey and take control of your longevity.

🏋️‍♂️ Track Your Sleep, Workouts & Recovery

Boost your performance and recovery with Whoop. Join with my referral link to get a free WHOOP 5.0 and one month free!

📲 Download the I Won’t Die App

Stay ahead with the latest news, updates, and insights. Download the I Won’t Die app now on the Apple App Store and Google Play!

📩 Contact Us

Have tips, photos, or questions? Want to collaborate? Reach out at [email protected] — we’d love to hear from you!

🔗 Stay Connected

📬 Subscribe to I Won’t Die Newsletter

Get the latest longevity breakthroughs, Blueprint updates, and exclusive content straight to your inbox — sign up now!

My Longevity Journey

Take Two: The Speed of Aging Redemption

Published

2 months ago

March 11, 2026

Sean Callahan

A second attempt at Bryan Johnson’s Blueprint Speed of Aging test, two lancets, warmer hands, and a little more determination.

Back in January I attempted Bryan Johnson’s Blueprint Speed of Aging test.

And it failed.

Not philosophically. Not emotionally. Not metaphorically.

After waiting longer than anticipated for the results, the lab said they simply could not process my sample. Ugh!

A couple weeks ago, Blueprint sent a replacement kit and yesterday I gave it another shot.

Round two.

The Speed of Aging Kit Arrives

The Blueprint kit showed up looking exactly like the last one. Clean packaging, everything neatly organized, and a reminder that this tiny box holds the key to measuring something pretty profound.

Your biological aging rate.

Inside the kit were the usual suspects:

two spring loaded lancets
alcohol wipe
gauze and bandage
the blood spot card
biohazard bag and return envelope

Everything you need to run a small longevity experiment from your kitchen counter. And that is exactly what I did last night!

Preparing for the Finger Prick

Last time I did this test the blood flow was strong and the sample filled quickly.

This time, not so much.

I followed the same advice the Quest technician gave me earlier in the year.

Warm hands.

So I ran them under hot water for a bit and set up my little testing station on the counter.

Alcohol wipe.
Lancet ready.
Sample card open and waiting.

I stared at the lancet again like it was a tiny plastic jack in the box.

The anticipation is still the worst part. I don’t mind at all having vials of blood drawn from my arm, but the anticipation of pricking my own finger is nerve-racking. Ha ha!

Pop. Again.

I pricked my finger and waited for the blood to flow.

It started slowly.

Slower than last time. I massaged my finger and it didn’t help much.

So naturally my brain went straight to the logical conclusion.

Better open a second blood source.

Second lancet.
Second finger. Ouch!

Now I had two active production sites.

Not exactly what the instructions call for, but efficiency matters.

Between the two fingers I was able to steadily blot the sample card until the circle filled and the blood absorbed through to the back.

That’s the key indicator that enough sample has soaked into the card for proper analysis.

Mission accomplished.

The Waiting Game

Once the card was fully saturated, I let it dry for about three hours.

After that it went into the biohazard bag, then into the return envelope.

Now it’s on its way back to the lab via USPS.

Results typically arrive digitally about two weeks after the sample is received.🤞

Why This Test Matters

The Blueprint Speed of Aging test is built on DNA methylation analysis, one of the most advanced methods currently available for measuring biological age.

Instead of looking at a handful of biomarkers, it analyzes epigenetic changes across thousands of DNA sites to estimate how quickly your body is aging. It measures the age of your lungs, blood, liver, kidney, heart, hormones, etc.

In other words, it measures the pace of aging itself, not just risk factors.

My Current Biological Age Signals

While I wait for the results, I already have two other aging indicators.

From my most recent Function Health panel:

Biological age: 35.3
About 10.8 years younger than my chronological age.

And from WHOOP:

WHOOP age: 30.8

WHOOP also tracks pace of aging, which currently shows 0.30x as of this morning.

Meaning my body is aging at roughly one-third the expected weekly rate based on recovery, sleep, HRV, and training load.

Different models. Different inputs.

But the signals are pointing in the same direction.

The Number I’m Watching

The Blueprint result is the one I’m most curious about.

The last time I ran this test in January 2025, my epigenetic age came back at 29.1 years old, roughly 15 years younger than my chronological age.

Since then I’ve doubled down on:

Mediterranean eating, consistent aerobic training, strength work, sleep discipline, and biomarker tracking.

So the big question now is simple…

Did the needle move or did the universe decide to humble me?

We’ll find out in about two weeks.

🩺 Disclaimer

🚀 Get Started with Blueprint

Start optimizing your health today with $25 off your first order! Use our referral code to begin your Blueprint journey and take control of your longevity.