Meet Kosei:Your human optimization engine.
Longevity as a Service. Apply peer-reviewed research. Monitor your markers. Determine efficacy.
Kosei brings rigor to longevity.
Most "health advice" is noise: headlines, stacks, and vibes. Kosei is the experimentation app that lets you pull your health data together, pick a real intervention, and see whether it actually moved the needle for you (or didn't).
Ingest data from the sources you already use. Choose what to try. Track the markers that matter. Get a clear read on efficacy across nutrition, training, sleep, supplementation, and whatever else you want to test.
This isn't a clinic. You're not a patient. You're running n=1 on yourself with the science that already exists, so you stop guessing.
The papers already ran. The remaining question is what held for you.
Your body already answers.
Most people never ask.
You have more say over how you age than you were told.
See which workouts, foods, and supplements actually work for you.
One paper. One change. In the life you already have.
The method
One proven change. Eight to twelve weeks.
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01
Cite
The study already ran. We name it. Guessing is the time sink.
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02
Apply
Hold one change through the window.
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03
Decide
Markers say whether it held.
Your body's data, synchronized.
Biological age, pace, and the markers you can watch.
Wearables, labs, sleep, meals, movement: one spine.
- Biological age A number you can watch, with the method named.
- Pace How fast you are aging, not only where you are.
- Markers Labs and wearables, read together, cited.
Intervention 1 · Sleep
Sleep · Volume 33 · 2010
Sleep duration and all-cause mortality: a systematic review and meta-analysis of prospective studies
1,382,999 adults · 16 prospective cohorts
A meta-analysis of 1.4 million adults found sleeping under six hours associates with 12% higher all-cause mortality.
Protect a full sleep window: seven to nine hours.
Run it for eight to twelve weeks. Then read whether it moved you.
The eight-to-twelve-week window is ours, not the paper's. That is the honest length for an n=1.
Intervention 2 · Steps
Lancet Public Health · Volume 7 · 2022
Daily steps and all-cause mortality: a meta-analysis of 15 international cohorts
47,471 adults · 15 cohorts · median 7.1 years of follow-up
Raise toward the evidence: six to eight thousand steps a day for older adults, eight to ten for younger. Ten thousand was a pedometer slogan, not a finding.
Hold the same change through the window.
The membership
Why wouldn't you?
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for founding 100 members
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