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You've probably felt it. You've got data everywhere — an Oura ring, a WHOOP, an Apple Watch, labs from your last annual physical, maybe a CGM. But none of it talks to each other. None of it tells you what to do. And your doctor has 15 minutes to make sense of all of it.
Tyler Smith felt the same thing. So he built the solution.
On this episode of the Playbook HQ Podcast, Hundred Health founder and CEO Tyler Smith breaks down why he left the world of real estate tech to build a personalized health platform, why he believes the level of care in America isn't broken — it's gated, and what the 100-day protocol actually does to people's behavior and results.
Tyler wasn't supposed to be building a health company. He'd already won. His previous company, SkySlope, became the dominant B2B SaaS platform for real estate transactions — serving two-thirds of all North American real estate deals and 900,000 realtors — before he sold it to Fidelity for $80 million.
After the exit, he went deep into longevity investing. Function Health. TruMe. Nucleus Genomics. Devoted Health. Superhuman. He had front-row seats to some of the most ambitious companies in the space — and started to see the same gaps repeating everywhere: generic AI outputs, biological age tests that delivered a score with no real plan behind it, and a widening distance between cutting-edge science and what people could actually do with it.
Then he took one of those biological age tests himself.
He was 39. His wife was expecting their first child. The test came back at 47.
Three things hit him at once:
1. He felt fine. Energy high. Looked good. Working out regularly.
2. His dad had died suddenly of a heart attack at 47.
3. As a new, older father — he started doing the math. How old is his daughter when he's 60? When she's driving?
That number didn't just scare him. It cracked open a set of deeply held, totally wrong beliefs.
He was sleeping four hours a night and bragging about it. He was doing intense cardio and tracking calories burned like a scoreboard. He was telling himself he had some rare "sleeper gene." He was going to a hard cycling class, burning 800 calories, and rewarding himself with a big brunch.
None of it was working the way he thought.
He hired sleep experts, human biologists, board-certified nutritionists, a personal trainer, and physicians who were nearly impossible to get access to. And everything changed. His energy hit new levels. He put on muscle he didn't know he was missing. His scale went up — and he almost quit because of it, until a DEXA scan showed him he was losing fat and gaining muscle simultaneously.
The result: he reversed his biological age by 15 years.
The data he needed wasn't just more data. It was the right data, interpreted correctly, with expert guidance on what to actually do.
That's what Hundred Health became.
Most health platforms give you a dashboard. Hundred gives you a protocol.
Here's how it works:
Step 1 — Ingest your medical records. Hundred connects to over 450 institutions to pull in your full medical history. Tyler calls it the Ronald Reagan model: trust but verify. You go through and confirm or deny what's still active.
Step 2 — Connect your wearables. Apple Health, Oura, WHOOP, Garmin, Strava, Peloton, CGMs, MyFitnessPal — over 45 integrations. The goal isn't to replace the apps you already use. It's to pull them out of silos and make the connections between them meaningful.
Step 3 — Extensive lab work. Not the basic panel your primary care orders. Hundred runs 160+ lab tests — the kind of deep blood work that can surface things your doctor may not have context for.
Step 4 — Expert guidance + action plan. This is the part that makes Hundred different. Tyler doesn't want you to have more data. He wants you to know what to do tomorrow. For $499 a year, members get access to those 160+ tests, ongoing health tracking, and a personalized action plan across diet, exercise, and supplements.
Step 5 — The 100-Day Protocol. Commit. Execute. Retest.
The 100-day window wasn't random. They worked with a PhD who studies habit formation and literally wrote a book on it. The conclusion: 100 days is long enough to see real change, but short enough to keep people from drifting. The annual physical model — where you have a whole year between accountability moments — doesn't work. The 100-day protocol does.
The proof? Over 80% of Hundred Health members schedule their follow-up blood work between day 100 and day 110. They want to see what changed. They're not drifting. They're racing to the retest.
This is Tyler's sharpest line — and it's worth sitting with.
The average patient gets less than 15 minutes with their physician. That's not a doctor problem. That's a systems problem.
Doctors aren't incentivized when you're doing well. They only see you when something is wrong. The health data is fragmented. And humans can't scale — they have back-to-back appointments and too many patients.
The gap isn't the quality of care. America has incredible doctors, data, and science. The gap is the execution layer — helping people actually follow through between visits.
Tyler experienced this firsthand. He went all in — elite doctors, deep testing, a full care team — and it worked. But the experience left him uncomfortable:
"I realized how rare that access was. This level of care isn't broken — it's gated. It works incredibly well, but it only exists for people who can afford to pay for private doctors, endless testing, and personal attention. Health shouldn't be a luxury product."
That's the founding thesis of Hundred. Take what only the wealthy get today and make it available to anyone who actually wants to take their health into their own hands.
At $499 a year — with 160+ lab tests included — that's not concierge medicine math. That's a deliberate attempt to democratize what previously required a six-figure care budget to access.
Tyler puts it simply: your doctor is there to treat illness. Hundred is there to help you build health.
He's seen it play out firsthand. Members show up to their primary care appointments with more in-depth data than the doctor has ever seen on them — sleep metrics, HRV trends, blood pressure patterns over months, comprehensive labs. The physicians aren't threatened. They're impressed.
From the outside, the jump from real estate to health looks like a leap. Inside Tyler's head, it was a straight line.
At SkySlope, he was pulling data from over 1,000 MLS systems — some of the most chaotic, inconsistent data pipelines imaginable. Compared to that, integrating medical records through standardized FHIR APIs was almost easy.
He'd also dealt with the security and compliance realities of handling wire transfers, social security numbers, and sensitive financial data. SOC 2 compliance, institutional trust, data protection infrastructure — all of it translated directly into building for HIPAA.
And the core insight was the same: fragmented data, living in silos, that doesn't serve the person it belongs to. In real estate, he connected transactions. In health, he connects everything that makes up you.
His years investing in the space sharpened the vision further. He'd seen Function Health scale to a $2.5 billion valuation. He'd seen what TruMe and Nucleus Genomics were building on the genomics side. He knew what was possible — and he knew what was still missing.
He describes the vision like this: you wake up and it tells you what to do, why to do it, and what it's adjusted for you in real time. Like the Jetsons, but for your body.
Not a quarterly check-in with a concierge doctor. Not another app that shows you your sleep score. A living, breathing, personalized health operating system that updates as your data does.
The platform is already doing this — connecting how your sleep patterns interact with your lipid markers, how your HRV trends correlate with specific blood work, how your continuous glucose data changes relative to training load. The correlations most people never see because their data is scattered across six different apps.
When asked who shapes his thinking, Tyler comes back to a single theme: obsessive consistency.
Kobe Bryant — for the discipline. First one in, last one out. Every single day.
Steve Jobs — for clarity of vision on the entrepreneurial side.
His dad — for resilience, and for the complicated motivation that came from losing him too early.
His wife — for the reminder that longevity isn't just about years. It's about quality. Being so locked in on optimization that you lose the point is its own kind of failure.
His take: "He or she who can be really consistent wins." Not the person who had the best single day. Not the person who did the most extreme protocol once. The person who shows up the same way, day after day, long after the motivation is gone.
After building a 2,000 square foot commercial space just to test wellness equipment — a personal R&D lab for him and his wife — Tyler has a clear, distilled sense of what actually moves the needle.
Red Light Therapy | The one his wife never misses, and neither does he. They use the most powerful red light bed on the market, built for high frequency and speed. Morning staple.
Cold Plunge | Three minutes, done before heavy strength training — not after. His reasoning: the fight-or-flight spike wakes him up and primes his body. Whether it's physiological or mental, the result is the same. He shows up to the session ready to perform.
Zone 2 Training + EWOT | Exercise with oxygen therapy — a mask that delivers enriched oxygen during hard cardio. His current protocol is the Norwegian 4x4 interval structure, with a specific goal of pushing his VO2 max into high-performer territory. Brutal, effective, evidence-backed.
Strength Training | The shift that changed everything in his transformation. Once he stopped measuring workouts in calories burned and started tracking muscle gain through DEXA scans, his whole framework flipped. The scale going up was good news. 300 calories burned in a strength session beat 800 on a spin bike.
Sauna |breathwork before, during, and after. He takes the science seriously — there's real evidence behind high-heat sauna, and he treats it like a protocol, not a luxury.
Hyperbaric Chamber | He's cycling back into this after getting a larger chamber that solved the claustrophobia issue with his original soft-shell unit. The protocol requires enough sessions to matter — which only became feasible once he could do them at home.
Continuous Glucose Monitoring + Wearables Stack | Apple Watch, Oura, WHOOP — he runs all three. He's a data person and he lives in the same platform he built.
3-Day Fast (Every ~2 Months) | Not a trend he chases. A hard protocol with a mental component he values as much as the physical benefits. Cellular autophagy, metabolic reset, and the discipline of sitting with real discomfort on purpose.
Tyler Smith didn't stumble into health tech. He got a number that scared him, went all in, reversed his biological age by 15 years, and then asked the uncomfortable question: why can't everyone do this?
What makes Hundred Health different isn't the features. It's the philosophy: data without action is just noise. The annual physical model is broken not because doctors are bad, but because accountability gaps kill follow-through. And the elite-level care that actually works has been locked behind a price point most people will never reach.
Hundred isn't replacing your doctor. It's making sure that when you see your doctor, you walk in with more clarity than they've ever seen from a patient — and that the other 364 days a year, you're not just waiting.
The longevity market is heading toward $8 trillion. Tyler's bet is that the biggest opportunity isn't more data. It's finally closing the gap between knowing and doing.
That's the operating system your body deserves.
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