Infrared vs Dry Sauna: What the Science Says

The Finnish studies, the detox research, and which one is actually worth your money

There’s a giant spaceship in the corner of my bedroom.

At least, that’s what it looks like when I turn it on.

The thing is so massive that my bed and the sauna are the only two objects that fit in my bedroom anymore.

The day it arrived, there was a humongous box in my living room.

A guy named Hector showed up to help me build it. Big dude with this cool bandana, probably wondering what kind of lunatic spends ten grand on a sauna for a one bedroom apartment.

It almost didn’t fit in the service elevator.

I tried to assemble the whole thing before my girlfriend got home.

Thought I could surprise her with a finished product instead of construction chaos. That didn’t happen. She came back to lumber everywhere, instruction manuals scattered across the floor, and Hector asking me if I was “sure about the placement, man.”

Her reaction? Pretty forgiving, honestly. But I could see it in her eyes. That look that said “if you make another financial decision like this without telling me, we’re going to have problems.”

Worth it though. Because what drove me to blow my entire first year corporate bonus on a bedroom sauna was simple.

I felt like absolute shit.

The Breaking Point

• Fatigue that wouldn’t quit.

• Hormonal issues I couldn’t explain.

• Brain fog that made my corporate job feel impossible.

I’d heard about sauna benefits before. The detoxification from heavy metals. The cardiovascular health improvements. The longevity boost from those Swedish studies showing people who sauna regularly have crazy low mortality rates.

But what really got me was the science of heat shock proteins.

These are proteins your body creates when exposed to heat stress. They help repair damaged cells, reduce inflammation, and basically make your body more resilient to all kinds of stress. Not just heat. Everything.

I needed that. Desperately.

So I started simple. Hit the sauna at my Lifetime Fitness after gym sessions. Felt amazing. Super relaxing. Got a nice sweat going. Then I started going more frequently. Not just after workouts. I’d go just to sit there and recover.

Eventually I found this sauna membership place. Ten different saunas. Two cold plunges. You reserve a private room for an hour. It was incredible.

It was also $150 a month.

I did the math. If I kept that membership for five years, I’d spend $9,000. Or I could just buy my own for $10,000 and own it forever. Easy choice, right?

Wrong. Because I didn’t know anything about the difference between infrared and dry saunas. All I knew was “saunas are hot and make you sweat and sweating is good.”

Turns out there’s way more to it than that.

From $10,000 corporate bonus to bedroom spaceship: Hector and I spent an entire day turning a giant pallet into the Sun Light Solo that now blocks my path to the balcony. My girlfriend came home to this chaos. She's still with me, somehow.

Dry vs Infrared: How They Actually Work

Before I bought my Sunlighten infrared sauna, I thought all saunas worked the same way. You sit in a hot box. You sweat. You feel better.

The reality is completely different.

Dry saunas heat the air around you. Think hot yoga studio vibes. The ambient temperature gets incredibly high. We’re talking 180 to 200 degrees Fahrenheit. Some Russian bathhouses push even higher. The heat surrounds you, your body responds by sweating to cool down, and you get all the cardiovascular benefits of that heat stress.

Infrared saunas use light wavelength as the heat source.

Let me explain this because it’s wild. The heat doesn’t come from hot air. It comes from red light panels that emit specific light frequencies. These frequencies penetrate deep into your tissue. We’re talking way beyond surface level. The infrared light penetrates up to 1.5 inches beneath the skin’s surface, causing water molecules in your body to vibrate and create heat through friction at the cellular level.

It’s a cellular sweat versus a surface sweat.

My infrared sauna only runs at 140 degrees. But I sweat way more than I ever did in a 200 degree dry sauna. Because the heat is penetrating deeper. It’s lighting up my cells and pushing toxins out at a level that ambient heat just can’t match.

When I first turned on my SunLighten Sauna and sat inside, it smelled like cedar and oak. I made sure to get a sauna with low EMF exposure and chemical-free wood. The full spectrum red light panels glowed. I put on a YouTube video through the Bluetooth speakers.

It felt epic.

But the real magic happened over the next few months when I started understanding what was actually happening in my body.

The Science Nobody Tells You (And The Numbers That Matter)

Here’s what I learned the hard way.

Those Swedish studies I mentioned? The actual research comes from the Kuopio Ischemic Heart Disease Risk Factor Study in Finland. They followed 2,315 middle-aged men for over 20 years. The findings are absolutely wild.

Men who used saunas 4 to 7 times per week had:

• 63% lower risk of sudden cardiac death compared to once per week users

• 50% lower risk of fatal cardiovascular disease

• 40% lower all-cause mortality

Even moderate use showed results. Men who took saunas 2 to 3 times weekly had a 27% lower risk of cardiovascular death and 24% lower all-cause mortality compared to once weekly users.

Sixty-three percent reduction in sudden cardiac death. That’s not a small number. That’s massive.

The study also found that duration matters. Sauna sessions lasting more than 19 minutes were associated with a 52% lower risk of sudden cardiac death compared to sessions under 11 minutes.

But here’s what surprised me during my testing. The benefits I experienced weren’t just about detoxification or cardiovascular health. The biggest change was sleep.

I didn’t expect that at all.

The temperature rebound effect is real. When you get into a sauna, your core body temperature can rise by about 1 degree Celsius during a 30 minute session. Your skin temperature shoots up to around 104 degrees Fahrenheit within minutes. After you get out, your body has this rebounding effect where it rushes back to homeostasis. Your temperature drops. Sometimes lower than it was before the sauna.

Research shows that this drop in body temperature signals your brain that it’s time to sleep. One study found that sauna sessions increased deep sleep by over 70% during the first two hours after use, and 45% over the first six hours. The body’s natural cooling process mimics what happens when you’re falling asleep naturally.

Your body loves being cool right before bed.

So I started doing 35 to 60 minute sessions about two hours before sleep. I’d take breaks, go outside, do some lymphatic shaking to move toxins through my system. Sometimes I’d dry brush my skin to stimulate lymphatic drainage even more.

Then I’d shower, do a face scrub with Alitura products, put on a clay mask, and get back in the sauna.

Yeah. Clay mask in an infrared sauna.

The clay I use combines kaolin clay, bentonite clay, grass-fed colostrum, and vitamin C. It’s incredible for pulling toxins out of your skin. But here’s the hack. When you combine it with infrared light penetrating your face, you’re boosting collagen production at the same time you’re detoxing.

Double benefit from one session.

I learned this while consulting with Alitura. They didn’t tell me to do it. I just experimented and realized the combination was next level for skin health.

The Detox Difference: Why Infrared Works at the Cellular Level

I mentioned I was dealing with heavy metals. Let me explain where those came from and why the research on sauna detox actually matters.

Part of my exposure came from living near a construction site. But honestly, heavy metals are everywhere. Our air. Our water. Our food. I believe most of us have an overaccumulation of these metals and don’t even know it.

When I did blood work with my functional medicine doctor, my mercury levels were really high. Not “you’re dying” high. But high enough that it explained a lot of my symptoms.

Here’s where the science gets interesting. A 2012 systematic review published in the Journal of Environmental and Public Health analyzed 24 studies on heavy metal excretion through sweat. The findings were compelling.

In individuals with higher heavy metal exposure, sweat concentrations generally exceeded plasma or urine concentrations. For some metals, dermal excretion through sweat could match or even surpass urinary excretion on a daily basis.

Specific findings:

• Arsenic: Dermal excretion was several-fold higher in exposed individuals compared to unexposed controls

• Cadmium: More concentrated in sweat than in blood plasma

• Lead: Found in sweat at concentrations 10 to 30 times higher than blood or urine levels in some studies

• Mercury: In one study, 15% of participants had no detectable mercury in blood, but all of them had mercury in their sweat after sauna use

A 2011 study called the BUS Study (Blood, Urine, and Sweat) tested 20 people and found that certain toxic elements appeared in sweat even when they weren’t detectable in blood or urine. The researchers specifically noted that infrared sauna use produced better results for eliminating bismuth, cadmium, chromium, mercury, and uranium compared to steam sauna or exercise alone.

Now, I need to be honest here. The evidence on sauna detox is promising but not conclusive. Some researchers point out that sweat collection methods vary widely, and the clinical significance of these small amounts of metals in sweat isn’t fully established. Your liver and kidneys still do most of the heavy lifting when it comes to detoxification.

But for someone like me with confirmed high mercury levels, the research suggested that regular sauna use could support my body’s natural detox pathways. Not replace them. Support them.

Because the light penetrates deeper into your cells with infrared, it’s mobilizing toxins at a cellular level. Dry saunas make you sweat. Infrared saunas make your cells release what they’ve been storing.

For someone who wasn’t getting much sun exposure and dealing with heavy metal accumulation, infrared was the better choice. I was getting red light therapy and cellular detox in one session.

That said, I’m not against dry saunas at all. I love them. They get way hotter. They have their own benefits. If I’m at a gym or spa and they only have a dry sauna, I’m absolutely getting in.

But if you’re choosing between the two and you have specific detox needs or want the red light benefits, the research leans toward infrared.

So Which One Should You Actually Get?

Here’s my honest answer based on both the research and my experience. It depends on what you’re dealing with and what you can afford.

Choose infrared if:

• You’re dealing with heavy metal exposure or want to support detox pathways

• You want red light therapy benefits for skin health and collagen production

• You don’t get much sun exposure

• You want deeper tissue penetration (infrared heats up to 1.5 inches below skin surface)

• You can handle the upfront cost

• You prefer lower temperatures (120-160°F) for longer sessions

Choose dry sauna if:

• You want the traditional Finnish sauna experience with proven cardiovascular benefits

• You like really high heat (180-200°F)

• You have easy access through a gym membership

• Most of the longevity research comes from traditional dry saunas

• You want to save money upfront

Budget breakdown:

• Gym sauna: $50 to $300/month membership (but might only have dry)

• Infrared sauna club: $150/month for unlimited sessions

• Home infrared unit: $10,000 upfront (mine is the Sun Light Solo)

• Installation costs: Add another $100 to $200 for electrical work if you need a different plug

I spent $10,000 on my unit. Plus a couple hundred for Hector to build it. Plus $100 to change the electrical output in my bedroom because I didn’t have the right plug.

My heating bill definitely went up too.

Was it worth taking up my entire bedroom? Honestly, yeah. Because I use it three times a week minimum. Sometimes more. And the benefits to my sleep, recovery, detox, and overall energy have been significant.

But would I recommend everyone do what I did?

Absolutely not.

How to Get Sauna Benefits (Without Spending $10K)

Here’s what I do now and what you can adapt based on your situation.

My current routine:

1. Hydrate like crazy before sessions (I drink water with Kaizen minerals which contains sea moss, taurine, magnesium, potassium, and sodium)

2. Get in the sauna for 35 to 60 minutes at 140 degrees

3. Take breaks every 15 to 20 minutes to do lymphatic shaking outside

4. Dry brush my skin to stimulate lymphatic drainage

5. Shower and do a face scrub

6. Apply clay mask and get back in for another 10 to 15 minutes

7. Final cold shower to close everything down

I aim for three sessions per week. Sometimes I hit it. Sometimes I don’t. Life happens.

The research-backed basics: Based on the Finnish studies, optimal benefits come from:

• 2-7 sessions per week (more frequent use showed greater benefits)

• 15-20 minutes minimum per session

• Temperature at least 174°F for traditional saunas (the temperature used in the longevity studies)

• For infrared, 130-160°F for 20-45 minutes

If you can’t afford a home unit: Get a membership at an infrared sauna club if one exists near you. Reserve sessions two to three times per week. Consistency matters more than intensity.

If you can’t afford that: Your local gym definitely has a sauna. It’s probably dry. That’s still incredibly valuable based on the Finnish research. Go after your workouts. Start with 15 to 20 minutes and work up to longer sessions. You’ll still get cardiovascular benefits, stress reduction, better recovery, and heat shock protein activation.

The baseline truth: Any sauna is better than no sauna. The differences between infrared and dry matter if you’re optimizing for specific outcomes. But if you’re just trying to add heat exposure to your routine for the proven longevity and cardiovascular benefits, start wherever you have access.

The Finnish men in those studies weren’t using fancy infrared units. They were using traditional wood-burning saunas. And they reduced their risk of dying by 40 to 63 percent.

Gym Sauna/Sauna Club Etiquette: What NOT to Do

I’ve been to sauna clubs, I’ve been to saunas in public gyms, and I’ve noticed a couple of behaviors that I would say don’t elevate your sauna experience as much.

Sauna is a traditional healing practice, and I think here are a couple ways to enhance that experience.

• Don’t bring your phone in the sauna. There’s a lot of science showing that the EMFs are exacerbated when you bring it into hot heat like that, and it also should be a relaxing practice. You’re kind of defeating the purpose if you’re going on your phone and scrolling and checking. I like to just put towels over my head. If I do watch YouTube sometimes in my personal sauna, I make sure I’m not touching any devices directly.

• Don’t wear clothes, especially tight synthetic underwear. I see all these guys wearing tight underwear and all these microplastics and polyester fibers are getting heated up and directly absorbing into your skin. Studies are showing these are essentially melting into you. Don’t wear clothes, just wear towels and some loose-fitting natural fabric if anything.

• If you’re in a public sauna space, don’t talk too loudly. That’s annoying, and usually people don’t like it. If you’re in a personal sauna, fine, but don’t go on the phone or anything like that. It’s pretty annoying for others trying to relax.

• Don’t go in the wet sauna or steam room at gyms. Usually the water is tap water with chlorine, fluoride, and other chemicals. When you’re heating that up and breathing it in, you’re getting a nice dose of toxins. Stick to dry or infrared saunas.

• Do bring a towel to sit on. Hygiene 101. Always sit on your own towel.

• Do stay hydrated. Drink 16-32 oz of water before, and rehydrate with electrolytes after. You can lose 1-2 pounds of water weight in a session.

The Mistakes I Made (So You Don’t Have To)

Biggest one? Buying a massive sauna for a small apartment without measuring properly.

I can’t walk through my bedroom anymore. Every morning I wake up and have to navigate around this thing. When I had a broken ankle, it was genuinely difficult to get to my balcony.

My girlfriend has been incredibly patient. But if I made another decision like this without discussing it first, I don’t think she’d be as forgiving.

Other mistakes:

• Not factoring in the power bill increase

• Underestimating how long sessions actually take (it’s not just 30 minutes, it’s prep, session, breaks, shower, cleanup)

• Not researching EMF levels properly (some cheaper infrared saunas have high EMF exposure that can actually cause harm)

• Thinking more heat always equals more benefits (it doesn’t based on the research; consistency and proper protocols matter more)

The most important lesson: If you’re going to invest in a home unit, work with a legit company. I went with SunLighten because they use full spectrum red light, have low EMF certification, use chemical-free wood, and actually care about the product they’re selling.

Cheap saunas can expose you to harmful EMF levels or off-gas chemicals from treated wood. That defeats the entire purpose of supporting your health.

What Actually Matters

Look, I spent my entire first year corporate bonus on a bedroom sauna. I didn’t tell my girlfriend until it showed up in a giant box. I had to reorganize my entire living space around it.

Was it extreme? Yeah.

Was it necessary? Probably not.

But here’s what I learned through all of it. Heat exposure is one of the most powerful tools we have for resilience, recovery, and longevity. The research is clear on this. Whether you choose infrared or dry doesn’t matter as much as actually doing it consistently.

The Finnish studies showing 40-63% reductions in mortality don’t differentiate between fancy units and basic wood-burning saunas. They just show that regular heat exposure works.

So start somewhere. Anywhere.

If you have access to a gym sauna, use it. If you can afford a membership at an infrared club, try it. If you’re crazy like me and want to own your own unit, do your research and buy quality.

Just get heat exposure into your routine. Your cardiovascular system will benefit based on decades of research. Your sleep will likely improve. Your recovery will speed up. Your stress response will become more resilient through heat shock protein activation.

And if you’re dealing with heavy metals, hormonal issues, or chronic fatigue like I was, the deeper tissue penetration from infrared might be exactly what you need.

Remember, wellness is about becoming aware and making choices toward a more successful existence. Every small choice adds up. Even if that choice involves a spaceship in your bedroom.

Want help figuring out which sauna approach makes sense for your specific situation? I’d love to work together and create a personalized protocol that fits your life and goals. Just reach out.