Why Sauna
The case for sauna, in other people’s words.
The science, stories, and voices behind why we built Yū: heat, cold, recovery, and the rituals that make them stick. Follow any one to its source.

Andrew Huberman · Huberman Lab
Benefits of Sauna & Deliberate Heat Exposure
A neuroscientist’s breakdown of what deliberate heat does to the body — cardiovascular health, hormones, stress resilience — and how to dose it.
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Decipher Dementia
The Protocol Behind a 66% Lower Dementia Risk
The large Finnish studies weren’t vague about protocol: roughly 174°F, twenty minutes, four to seven times a week. A clear look at the numbers, plus what hot baths offer if you don’t have a sauna.
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Mark Hyman, M.D.
Two Sessions, 500% More Growth Hormone
On heat therapy’s effect on growth hormone, immunity, and inflammation. Nearly any form of heat counts, sauna or hot bath.
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Penelope Michaelidou
Your Brain on Heat: Focus, Then Calm
Twenty minutes of heat spikes norepinephrine — sharpening focus — then drops you into deep parasympathetic calm. A case for the sauna as nervous-system training.
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Dr. Eric Berg
What Happens If You Sauna for 14 Days
Two weeks of daily heat, in plain language: what it does to circulation, recovery, and stress.
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Coldture Wellness
What’s Really in Your Sweat
A surprising look at what actually leaves the body in the heat. A good sauna, it turns out, comes down to temperature, timing, and consistency.
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Health News Explained
The Habits That Extend Healthspan, Ranked
Daily habits compound for you or against you. An evidence-ranked list of what truly lengthens healthy years. Heat exposure is on it.
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Bryan Johnson
The Measured Pursuit of a Longer Life
“I swallowed a computer to answer one question.” The internet’s most-measured human on chasing the data behind a longer life. It’s the mindset behind any ritual worth keeping.
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Tal Ben-Shahar
How to Be Happier
The deeper why. An animated summary of his book “Happier,” and its case that well-being gets built from small rituals you repeat rather than chase.
Watch on YouTubeConvinced, or just curious? The fastest way to understand the ritual is to feel it.
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