Habits should come from your body.
Walking after meals means something different when your glucose spikes than when it doesn’t. Generic advice misses that. Your own health context should shape what you practice.
About Kasane
Kasane means to layer.
Kasane (kah-SAH-neh, 重ね) is a Japanese word for patient, deliberate accumulation, the way soil builds fertility and tree rings record every season. Small things stack, with care, until they hold.
Why Kasane exists
We believe taking care of yourself is the prerequisite for everything else.
The person who books the appointments, remembers the allergies, tracks the meds, and notices when something seems off is holding a lot for their kids, their partner, and their aging parents. And they usually put themselves last.
Kasane starts with you, because when you’re sleeping well, moving well, and eating in a way that serves your body, you have the energy to show up for the people who depend on you. So much of showing up is keeping track, so Kasane carries that too: one journal where your family’s health story lives, so the person holding it can spend their energy on care.
Why I built Kasane
Health data changed my life. Then it almost broke me.
I’ve spent my entire career at the intersection of health and behavior change. As a professional athlete optimizing my training. As a coach and personal trainer helping clients at the gym. As a founder at Territory Foods, where we tried to make healthy eating so accessible that the habit just stuck.
During the pandemic, I went deep on my own data. Full-body MRI. 150+ biomarker panels. Microbiome testing. Stool tests. I had every number tracked in a meticulous spreadsheet going back a decade.
I tried working with the system: a large care team spanning functional medicine, primary care, nutritionists, personal trainers, and specialists like cardiologists. And it was incredibly hard to line everyone up. Each provider had a slice of the picture, but it was up to me to connect all the dots. It was honestly pretty overwhelming.
All that knowledge actually drove my health anxiety up. Knowing more didn’t mean doing more. It meant worrying more.
Then in early 2023, GPT-level language models hit a tipping point. I started feeding them my labs, my history, my questions, and for the first time something could actually synthesize it all. The burden lifted. Instead of me piecing together every data point, I had a tool that could help me figure out the three or four things that actually mattered right now. The relief was real.
But I didn’t want to build for health optimizers like me. I wanted to build for everybody else: the parent at school pickup who got their labs back and thought “I should probably do something about this” and then never did.
The latest layer has been parenting. I’m a dad of two, with aging parents who’ve been through a couple of health scares. I’m somewhere in the middle, trying to help everyone: my own health, my spouse’s, my kids’, my parents’. Kasane grew out of that reality. With limited time, running businesses, being a dad, I needed a system that could tell me the small, risk-adjusted, genuinely impactful things I could do each day.
It’s relieved so much of my health anxiety. And it’s helped me help the people I care about care for themselves.
Paul MederosFounder, Kasane
What we believe.
A few convictions that shape everything we make.
Focus beats volume.
You can realistically form one new habit at a time. Everything beyond that is aspirational clutter. One small change, given time to take root, does more than ten started at once.
Evidence first, then identity.
You start by walking after dinner tonight, and tomorrow, and for 21 days. The evidence builds and the identity follows: you become someone who takes care of themselves by doing it.
Habits are seasonal.
Some layers stay for good, and others come and go: an elimination diet during a flare, extra mobility work after you tweak a shoulder. Your practice changes with your life, and benching a habit is part of it.
Your data should work for you, and stay yours.
Health data sitting in portals is inert. In Kasane, labs and visit notes sit beside your days, where you can use them, and they live in your own iCloud.
Change is easier kept together.
A health change sticks better when your partner is making one beside you. Everyone gets their own journal, you cheer each other on, and the kids grow up inside the rhythm.
Layer by layer.
Good soil isn’t manufactured. Season after season, organic matter accumulates and rain carries minerals deeper. No single season builds fertile ground, but stack enough of them, patiently and deliberately, and the soil holds everything.
We think health works the same way. No single habit changes your life, and no single lab result tells your whole story. Stack them, a few at a time, and something emerges that’s greater than the sum.
