I've Been Saunaing 4x a Week for 2 Years. I Just Found Out I Was Poisoning Myself the Entire Time. β€” SaunaStack Journal
SAUNASTACK JOURNAL

I've Been Saunaing 4x a Week for 2 Years. I Just Found Out I Was Poisoning Myself the Entire Time.

A deep dive into what actually happens inside your body during a sauna session β€” and the one thing I changed that fixed everything.

Jake Calloway
Jake Calloway Β· March 2026 Β· 14-min read
Man in sauna

I Thought I Had It Dialed

I was the sauna guy. The one who'd send you the Huberman episode unprompted. The one with the cold plunge in his backyard and the Oura ring tan line on his left hand.

My protocol was dialed. 4 sessions a week. 180Β°F. 20 minutes. Cold plunge after. I tracked my HRV religiously. I'd done the research. I'd watched every episode of the Huberman Lab that mentioned heat exposure. I followed Rhonda Patrick before she had a million subscribers.

I was, by any reasonable standard, doing sauna right.

Or so I thought.

There was one thing I never questioned. I assumed sweating equaled detoxing β€” that the act of sweating was doing the heavy lifting. That my body was pushing toxins out through my skin and I was leaving the sauna cleaner than when I walked in.

I was wrong. Embarrassingly, dangerously wrong.

Then I Read This One Study

It was 11 PM on a Tuesday. I was deep in a PubMed rabbit hole β€” the kind where you open seventeen tabs and forget what you originally searched for. I'd started looking at bile acid metabolism, of all things, and stumbled onto a term I'd never encountered before:

Enterohepatic recirculation.

The more I read, the worse I felt. Not physically β€” existentially. I'd been saunaing religiously for two years. And my gut had been sending 95% of the toxins my liver mobilized right back into my bloodstream.

Late night PubMed research

Let me put this as simply as I can:

Your liver detects the heat. It starts mobilizing stored toxins β€” lead, mercury, cadmium, BPA, mycotoxins. It dumps them into bile, which flows into your small intestine. This is the detox part. This is what's supposed to happen.

But then your small intestine does what it always does β€” it reabsorbs. Not just nutrients. Everything. Including the toxins. 95% of them go right back into your bloodstream.

Each bile salt molecule gets recycled approximately 20 times per digestive phase. That's 20 opportunities for your gut to reabsorb the exact toxins your liver just mobilized.

πŸ“ MY NOTES

"Enterohepatic recirculation = liver dumps, gut reabsorbs, liver dumps again. Cycle repeats ~20x. This is TEXTBOOK. How did I not know this?"

THE RECIRCULATION LOOP
πŸ”₯ Liver mobilizes toxins
↓
Dumps into bile β†’ Small intestine
↓
⚠️ 95% REABSORBED back to bloodstream
↓
Returns to liver, brain, kidneys
↻ Repeats ~20x per digestive phase

"Less than 3% of intestinal bile acids escape reabsorption."

β€” ScienceDirect, Bile Acid Metabolism Review

"Enterohepatic circulation will increase the toxicity of a compound to organs in the enterohepatic circuit."

β€” ScienceDirect, Toxicology
Stop recirculating toxins β†’
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I Did The Math On My Own Sauna History

I sauna 4 times a week. That's 16 sessions per month. 192 sessions per year. Over 2 years, that's 384 sessions where my liver mobilized toxins and my gut reabsorbed 95% of them.

384 recirculation events.

Lead going back to my brain. Mercury cycling through my kidneys. Cadmium hitting my liver again and again. For two years.

MY DAMAGE CALCULATOR
Sessions/week4
Weeks of sauna history104 (2 years)
Total sessions416
Toxin mobilization events416
Recirculation rate (no binder)95%
Total recirculation events395
Organs affected per eventLiver, kidneys, brain
TOTAL: 395 times his organs processed recirculated toxins

I started reframing my past symptoms through this new lens. The afternoon brain fog I blamed on sleep. The headaches I blamed on dehydration. The fatigue I blamed on overtraining.

Every symptom I'd been normalizing suddenly had an explanation. And it wasn't overtraining. It wasn't dehydration. It was my gut, quietly recycling poison.

MY SYMPTOM HISTORY β€” REINTERPRETED
Month 3
Post-sauna headaches. Blamed: Dehydration
ACTUAL: Toxin recirculation
Month 8
Constant afternoon brain fog. Blamed: Work stress
ACTUAL: Toxin recirculation
Month 14
Felt WORSE after longer sessions. Blamed: 'Detox reaction'
ACTUAL: Toxin recirculation
Month 20
Energy crashed despite perfect sleep. Blamed: Overtraining
ACTUAL: Toxin recirculation

I Went Looking For a Solution

I did what every self-respecting biohacker does when they discover a problem: I went to Reddit.

r/Sauna. r/Biohackers. r/Supplements. r/longevity. I searched every thread I could find about pre-sauna protocols.

I found the answer. It was: take 11 different supplements, manage 4 different timing windows, spend $187/month, and don't forget the one that gives you the niacin flush that makes you look like a boiled lobster.

r/Biohackers347
"I take NAC, charcoal, niacin, magnesium, electrolytes, and vitamin C before every session. Yes it's insane. No I can't keep doing this."
r/Sauna892
"Why isn't there a single pre-sauna supplement? Seems like an obvious product."
r/Supplements156
"Activated charcoal before sauna = 3 days of constipation. Never again."
r/longevity521
"I follow Huberman's protocol exactly but he never mentions what to take BEFORE the session."
Cabinet full of supplement bottles

I tried the full DIY stack for 3 weeks. The charcoal made me constipated. The niacin flush was unbearable. The logistics were maddening β€” 22 minutes of prep before every session. I quit.

"Isn't there just ONE thing I can take?"

That question led me to clinoptilolite zeolite research. And that research led me to SaunaStack.

THE DIY STACK I TRIED
  • NAC
  • Activated charcoal
  • Niacin
  • Magnesium glycinate
  • Electrolyte mix
  • Vitamin C
  • Creatine
  • Omega-3
  • Chlorella
  • Milk thistle
  • Glutathione
Cost: $187/month
Prep: 22 minutes
QUIT: Week 3
WHAT I SWITCHED TO
SaunaStack Pre-Sauna Gummies
2 gummies, 30 minutes before session
Cost: $49/month
Prep: 30 seconds
STILL GOING: Month 4+

Why Zeolite Specifically

I spent a weekend reading every study I could find on clinoptilolite zeolite. Here's what convinced me.

Think of zeolite as a molecular cage. The clinoptilolite structure has tiny pores with a negative charge. Heavy metal ions β€” lead, mercury, cadmium β€” have a positive charge. The zeolite traps them inside the cage and carries them out through your stool. Your nutrients pass right through because they don't fit the cage.

This isn't speculation. This is published, peer-reviewed mineralogy.

PMC Critical Review, 2019

In lead-intoxicated mice, clinoptilolite decreased lead accumulation in the intestine by more than 70%. Selective for toxins β€” does not affect homeostasis of trace elements and micronutrients.

Flowers et al., 2009 β€” Human Clinical Trial

Clinoptilolite supplementation showed increased heavy metal urinary excretion with no electrolyte disruption at 7 or 30 days. Published in Dove Medical Press.

PMC, 2023 β€” 12-Week Rodent Study

Decreased toxicant levels in kidney, femur, and intestine after 12 weeks. Effective against: arsenic, cadmium, chromium, lead, mercury, and nickel.

ACTIVATED CHARCOAL

Mechanism: Indiscriminate adsorption

Binds toxins, vitamins, minerals, and medications

Constipation common

Limited clinical evidence for sauna use

CLINOPTILOLITE ZEOLITE

Mechanism: Selective ion exchange + molecular caging

Traps only heavy metals; nutrients pass through

No GI side effects reported

PMC-reviewed. GRAS status. Stays in GI tract.

Why gummies over capsules? Faster GI transit. The gummy format gets the zeolite to its binding position in the intestine before your liver even starts dumping during the heat stress response. Timing matters.

Here's where I got mine β†’
90-day money-back guarantee Β· Free shipping on 2+ jars

I Tested It For 30 Days

Week 1: The gummies taste decent β€” slightly citrus. I took 2 about 30 minutes before my session, like the label says. First session: I honestly didn't notice anything different. Second session: same. Third session: I realized I didn't have my usual post-sauna headache. Could be placebo. Could be real.

Week 2: By week two, the pattern was undeniable. The afternoon brain fog that I'd been living with for over a year was... gone. Not reduced. Gone. I kept waiting for it to come back. It didn't.

Week 3: I extended my sessions from 20 to 25 minutes. Normally that would wreck me. This time, I felt fine. Better than fine β€” I felt like I was actually getting the session I'd been paying for all along.

Week 4: A month in. I haven't missed a session. I haven't felt the urge to quit (unlike the 11-supplement stack). The compliance is near-perfect because it's 2 gummies and 30 seconds. That's the real innovation here β€” not just the science, but the fact that you'll actually do it.

Journal notes and SaunaStack product
30-DAY RESULTS TRACKER
Metric Before After 30 Days
Post-sauna headaches3-4x/week0 in 30 days
Afternoon brain fogDaily (7/10)Rare (2/10)
Max comfortable session20 minutes28 minutes
Post-session energy crashEvery session1x in 30 days
Sleep quality (subjective)6/108/10
ComplianceN/A100% (0 missed)
Monthly cost$0 (no protocol)$49

These are my personal observations, not clinical claims. Individual results will vary.

Here's where I got mine β†’
90-day money-back guarantee Β· Free shipping on 2+ jars

The Science I Wish I'd Known Sooner

My little 30-day experiment is just one data point. But the science behind why it worked? That's 20+ years of data.

The Finnish KIHD study followed 2,315 men for over 20 years. The findings were staggering.

63%
Lower Sudden Cardiac Death
50%
Lower Cardiovascular Mortality
40%
Lower All-Cause Mortality

Finnish KIHD Study Β· 2,315 men Β· 20+ years Β· 4-7x/week vs 1x/week

Peter Attia β€” who is famously cautious about health claims β€” publicly called these numbers "ridiculous." He meant it as a compliment. Rhonda Patrick's work on heat shock proteins positioned sauna as an exercise mimetic. Huberman dedicated an entire episode to protocol optimization.

These three collectively shaped how millions of people sauna. But none of them addressed what happens to the toxins your liver mobilizes during a session. That gap is what SaunaStack fills.

The mental health data hit me hardest. A 2016 study published in JAMA Psychiatry found that a single hyperthermia session reduced depression symptoms by approximately 50%, with effects lasting 6 weeks. The mechanism involves endorphin release and BDNF increase.

Here's the connection that changed everything for me: if recirculation sends toxins to your brain, it increases neuroinflammation β€” the exact pathway that drives depression and cognitive decline. So the sauna can heal your mind or harm it, depending entirely on whether you have a binder in your gut.

"Single session of whole-body hyperthermia produced a rapid antidepressant effect that persisted for at least 6 weeks."

β€” Raison et al., JAMA Psychiatry 2016

Additional fitness data: published research shows a 47% reduction in delayed onset muscle soreness (DOMS) at 24 hours post-sauna, and extreme protocols have demonstrated up to a 16x growth hormone spike. Russian Olympic programs mandate sauna for recovery.

These benefits compound. But they're undermined every time your gut sends toxins back into circulation instead of out.

The Objections I Had (And How I Answered Them)

Jake thinking

Before I ordered, I had every objection you probably have right now. Here's how I talked myself through them.

"Is this just another detox scam?"

That's what I thought. But zeolite isn't a mysterious herb from a shaman in Peru. It's a volcanic mineral with a defined crystal structure, a documented ion-exchange mechanism, and PMC-reviewed studies on heavy metal binding. The Flowers 2009 clinical trial showed measurable increases in urinary heavy metal excretion. This isn't woo. It's mineralogy.

"$49 feels like a lot for gummies."

I spent $187/month on my DIY stack for 3 weeks before quitting. I spend $150/month on my gym. $60/month on protein. $49 for the thing that makes my 4x/week sauna sessions actually effective? It's $1.63 per session. That's less than the oat milk latte I drink afterward.

"Can't I just use activated charcoal?"

I tried. Two things happened: constipation for 3 days, and I later learned that charcoal is indiscriminate β€” it binds nutrients, medications, and vitamins alongside toxins. Zeolite is selective. The PMC review confirmed it "does not affect the homeostasis of trace elements and micronutrients." Different mechanism entirely.

"I've saunaed for years and I'm fine."

So had I. But "fine" is relative. I didn't know I had post-sauna brain fog until it was gone. I didn't know my headaches were avoidable until they stopped. You might be at 70% and thinking it's 100%.

"Where's the proof?"

PMC Critical Review (2019). Flowers et al. (2009). PMC rodent study (2023). Finnish KIHD (20+ years). Raison et al., JAMA Psychiatry (2016). I linked every one of them above.

Here's What I'd Tell a Friend

Handing gummies in sauna

If a friend asked me what I changed about my sauna routine, I'd hand them this jar and say: "Take 2 of these 30 minutes before you go in. That's it. You're done."

800mg clinoptilolite zeolite. 150mg acacia fiber. Zero sugar. Heat-stable gummy. 3rd-party tested for heavy metals. Made in the USA.

The gummy format isn't a gimmick β€” it's faster GI transit than capsules. The zeolite reaches your intestine and starts binding before your liver even starts dumping. Timing matters.

SaunaStack product jar
1 Jar
30 Days
$49
$99
+ Free Sauna Guide
Get SaunaStack β†’
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What I Know Now That I Didn't Before

Man relaxing in sauna

I used to think sauna was simple. Get hot. Sweat. Get out. Feel good. I didn't know my gut was recycling 95% of what my liver was trying to eliminate. I didn't know each session was a recirculation event my organs were absorbing. I didn't know that the headaches, the fog, the fatigue β€” all of it was avoidable.

I can't undo 384 sessions of unprotected recirculation. But I haven't had a single session without a binder since.

If you sauna even twice a week, here's what I'd tell you: the science on sauna benefits is overwhelming. The KIHD data is real. Heat shock proteins are real. The mental health benefits are real. But all of that is undermined if your gut is quietly sending mobilized toxins back into your bloodstream every session.

2 gummies. 30 seconds. $1.63 per session.

That's the delta between a sauna that heals you and a sauna that recirculates poison.

P.S. β€” Every order comes with a free copy of "The Biohacker's Guide to Sauna Mastery" β€” the complete pre/during/post protocol I now follow. Even if you don't get the gummies, read the guide. It'll change how you think about your sessions.

Here's where I got mine β†’ SaunaStack.co
90-day money-back guarantee Β· Free shipping on 2+ jars

Disclaimer: These statements have not been evaluated by the Food and Drug Administration. SaunaStackβ„’ Pre-Sauna Gummies are not intended to diagnose, treat, cure, or prevent any disease. The content on this page is for informational purposes only and is not a substitute for professional medical advice.

The personal experience described above reflects one individual's subjective observations over a 30-day period. These are not clinical results. Individual experiences may vary. Scientific references cited are publicly available peer-reviewed studies and are not intended to imply that this product replicates clinical outcomes.

SaunaStackβ„’ is a dietary supplement containing clinoptilolite zeolite, which has Generally Recognized as Safe (GRAS) status. Consult your physician before starting any new supplement, especially if you are pregnant, nursing, taking medication, or have a medical condition.

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