Bryan Johnson· Author
Sauna is not currently part of my routine as there's not great evidence in healthy people.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
Sauna is not currently part of my routine as there's not great evidence in healthy people.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
I may experiment with sauna to explore whether it can improve my cardiovascular health as measured by ultrasound.
Present: sauna metformin Future: IHHT (intermittent hypoxia-hyperoxia therapy) EMF reduction grounding vs no grounding PEMF (pulsed electromagnetic field therapy) neuro-Photobiomodulation EECP (enhanced external counterpulsation) NAD/NR infusion (maybe) methylene blue
We don’t currently have a sauna protocol as part of Blueprint, not because there aren’t potential benefits, but because we haven’t been able to identify evidence that supports our objective of reducing biological aging for me.
My Sunday morning: > breath work > light breakfast > claude code > exercise > 230°F (110°C) sauna > sauna makes me so sleepy https://t.co/sh9viDdxEa
> sauna makes me so sleepy
I've been measuring my core body temperature post sauna with an inner ear device. But it's not accurate enough.
For these 232 sessions, I measured the temperature of the air, humidity, duration, frequency, the sweat output, blood biomarkers, vascular response, toxin clearance and fertility markers. There is no human body in history that has been more measured in sauna than mine.
> Full detoxification of 3 out of 6 environmental toxins, remaining 3 were slashed by 55% to 65%, one toxin was reduced by only 15% and persisted at a slightly elevated level (with 15 sessions only).
Do you think that has anything to do with Sauna? I don't know. I I mean, it's possible.
For for baseline measurements we did we did a full blood panel. So that's over a hundred different markers and they're the things you would expect like uh cholesterol inflammation testosterone you know, things like that. We also did a few vascular health markers uh including SDMA, ADMA, and F2. We also got a central blood pressure device.
I'm now 18 sessions in and my body has definitely adjusted. It took me at least two weeks, like 14 sessions to just begin to be acclimated. But yeah, it is 200 degrees is hot and especially I do it right after a workout.
Um, but given where you're currently at right now, I think it's gonna be hard to measure anything remarkable on the actual blood tests themselves.
And now it's like okay if I I should just have a cut off like it's noon or 1 if I hit that point and I haven't had a chance to eat I'm not doing it
4–7 sauna sessions per week, 20 minutes at 80°C+, reduce cardiovascular mortality risk by 40% over a decade.
Regular sauna use raises BDNF and improves verbal memory in older adults.
Sauna protocols only generate the longevity effect when sessions exceed 30 minutes.
Hot-tub bathing yields cardiovascular benefits comparable to traditional Finnish sauna at matched core-temp dose.