The Dry-Sauna Detox Protocol
Sweat out toxins and microplastics with heat while icing to protect fertility
- Difficulty
- Easy
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 82%
Johnson's sauna protocol targets toxin and microplastic clearance while protecting fertility. He uses a traditional dry sauna (infrared doesn't get hot enough, wet sauna burns) at roughly 200F/93C for 20 minutes daily, stacked immediately after a workout so he's pre-warmed and time-efficient. The load-bearing detail is icing: cheap BPA-free ice packs held against the testicles inside two layers of cotton, because sauna heat otherwise smashes sperm count, motility and morphology by around 50%. He wipes sweat as it surfaces (to capture excreted toxins) and showers straight after. He credits the protocol with a ~90% reduction in blood and semen microplastics, dramatic toxin clearance after LA-wildfire exposure, a 400% VEGF increase and record-high fertility markers, though he can't fully separate sauna from icing effects.
Origin
Extracted from Bryan Johnson's Blueprint experiments, including measuring toxin load before and after the LA wildfires and running icing on/off cycles to isolate fertility effects.
Core principles
- 01Dry sauna raises core temperature where infrared and wet sauna can't
- 02Toxins and microplastics are excreted through sweat
- 03Heat annihilates fertility markers unless the testicles are cooled
- 04Stack the sauna onto an existing workout to save time and pre-warm
- 05Expect an adaptation period before benefits stabilise
How to run it
- 1
Choose a traditional dry sauna
Use a dry sauna, not infrared (too cool to raise core temperature) or wet (burns at the needed temperatures). Set it to about 200F / 93C.
Pro tip Dry sauna has the most evidence because the goal is raising core body temperature.
- 2
Stack it after a workout
Do the 20-minute session immediately after training so you're already warmed up and don't waste the first several minutes reaching temperature.
Pro tip Habit-stacking the sauna onto training makes the routine far more consistent.
- 3
Ice the testicles
Place two reusable BPA-free ice packs against the testicles, held by cotton underwear plus cotton shorts, for the whole session to protect fertility markers.
Pro tip Cheap blue Amazon ice packs (pack of four, ~$8) work fine.
Watch out Without icing, sauna heat can crash sperm count, motility and morphology by ~50%.
- 4
Wipe sweat and shower after
Wipe sweat off as it surfaces so excreted toxins don't dry back onto the skin, then shower straight after the session.
- 5
Ride out the adaptation period
Do it daily, but expect the first one to two weeks to feel harsh and even disrupt sleep; benefits and tolerance stabilise after adaptation.
Pro tip Once adapted, an evening session may actually improve sleep; run it as an experiment.
Watch out Doing sauna in the morning or before adaptation initially wrecked Johnson's sleep.
In the wild
Johnson measured microplastics in his blood and semen, then ran the dry-sauna-plus-ice protocol daily. He reported over a 90% reduction in both, which he described as a first-in-world demonstration since no one had previously repaired semen microplastic levels. After LA wildfire exposure left him in the 99th percentile for toxins, the sauna 'annihilated' them.
→ ~90% blood and semen microplastic reduction plus dramatic toxin clearance.
Common mistakes
Skipping the ice packs
Heat without testicular cooling smashes fertility markers by roughly half, with downstream negative effects on testosterone and overall health even if you don't want children.
Using infrared or wet sauna
Infrared doesn't raise core temperature enough and wet sauna burns at the required heat; only dry sauna delivers the intended effect.
Is it for you?
Best for
Someone with sauna access wanting a simple daily detox and vascular-health protocol without exotic equipment.
Not ideal for
People without dry-sauna access or with heat-sensitive medical conditions.
From the transcript
“20 minutes a day at 200 degrees Fahrenheit... you want to put ice packs on your testicles because otherwise it annihilates your fertility markers.”
“I had over a 90% reduction in my blood and my semen of microplastics.”
From the episode
The 2026 Immortality Protocol - Bryan Johnson - #1054
Bryan Johnson