Are Infrared Saunas Safe? The Evidence-Based Answer (2026)

This is the question I get asked more than almost any other: 'Are infrared saunas safe?' After 12 years of building saunas and using one nearly every day myself, my answer is straightforward: yes, for the vast majority of people, infrared saunas are very safe when used correctly.

But I don't want to just reassure you — I want to give you the actual information you need to make an informed decision. That means covering what's genuinely safe, what the real risks are (they're manageable), what the fake concerns are (they're mostly fear-based marketing), and who specifically should talk to their doctor before using one.

Infrared radiation: why the word 'radiation' sounds scarier than it is

The word 'radiation' triggers alarm bells for most people. But infrared radiation is fundamentally different from the types of radiation that are actually dangerous.

There are two categories of radiation: ionizing and non-ionizing. Ionizing radiation — X-rays, gamma rays, nuclear radiation — has enough energy to knock electrons off atoms and damage DNA. This is the radiation that causes cancer. Non-ionizing radiation — radio waves, visible light, microwaves, and infrared — does not have enough energy to damage DNA. Period.

Infrared light is non-ionizing radiation at the low-energy end of the electromagnetic spectrum. It cannot cause cancer. It cannot damage DNA. It is the same type of energy that your own body emits naturally — your skin radiates infrared at approximately 9.5 microns.

Hospitals have used far infrared warmers on newborn babies in delivery rooms for decades. If there were safety concerns with far infrared exposure at these wavelengths, neonatal medicine would have identified them long ago.

The real risks — and how to manage them

Infrared saunas aren't risk-free. But the actual risks are straightforward and entirely manageable with basic precautions.

Dehydration

You lose significant fluid through sweating during a session — typically 1-2 pounds of water weight. If you don't replace this fluid, you'll experience dizziness, headaches, and fatigue. The solution is simple: drink 16-24 oz of water before your session, sip water during, and drink another 16-24 oz with electrolytes after. This isn't optional — it's essential.

Mineral depletion

The 2023 wIRA study confirmed that sauna sweat contains significant amounts of beneficial minerals alongside toxic elements — calcium, magnesium, selenium, zinc, and others. Regular daily use without mineral replacement can lead to deficiencies over time. Supplement with a quality electrolyte and trace mineral supplement, especially if you're using your sauna 5+ times per week.

Blood pressure changes

Heat causes vasodilation — your blood vessels expand to help cool your body. This temporarily lowers blood pressure. For most people this is a benefit. But if you stand up too quickly after a session, you may experience orthostatic hypotension — a sudden blood pressure drop that causes dizziness or lightheadedness. The solution: sit up slowly, wait 30 seconds, then stand gradually. Cool down for 5-10 minutes before resuming normal activity.

Overheating

If you push too hard — staying too long, setting temperature too high, or using a sauna while dehydrated or alcohol-impaired — you can overheat. Symptoms include nausea, rapid heartbeat, confusion, and in extreme cases, heat exhaustion. Listen to your body. If you feel unwell, step out. Start with shorter sessions at lower temperatures and build up gradually.

Who should talk to their doctor before using an infrared sauna

Most healthy adults can use infrared saunas safely with no medical clearance needed. However, certain groups should consult their physician first:

People with cardiovascular conditions: uncontrolled high blood pressure, heart failure, recent heart attack, or arrhythmia. The cardiovascular demand of a sauna session (elevated heart rate, vasodilation) is comparable to moderate walking — which is generally beneficial, but should be discussed with your cardiologist if you have existing conditions.

People taking medications that affect heat regulation: diuretics (increase dehydration risk), beta-blockers (alter heart rate response), blood thinners (affect circulation), and some antidepressants or antihistamines (impair sweating). These medications can change how your body responds to heat, making it harder to cool itself.

Pregnant women: While far infrared has been used safely during pregnancy in some clinical settings, most medical guidelines recommend avoiding sustained core temperature elevation above 101°F during pregnancy. Consult your OB/GYN.

People with acute illness, fever, or active infection: When your body is already fighting an illness, adding heat stress diverts resources from your immune response. Wait until you've recovered.

Children under 12: Children regulate body temperature less efficiently than adults. If children use an infrared sauna, sessions should be shorter, cooler, and always supervised.

EMF: the one legitimate safety variable most companies ignore

EMF — electromagnetic fields — is the one safety concern in the infrared sauna industry that varies dramatically between products and IS worth paying attention to.

Every electrical device produces EMF. The relevant question for saunas is: how much, and how close are you sitting to the source? In an infrared sauna, you're 6-12 inches from heaters for 30-40 minutes, multiple times per week, for years. That's a unique exposure pattern.

Cheap imported heaters typically produce 20-100 mG at seated positions. The WHO recommends limiting prolonged exposure to 3 mG or less. VantaWave® heaters average less than 0.20 mG — 100 to 500 times lower than most competitors.

Is there definitive proof that low-level EMF from saunas causes health problems? No. The research is inconclusive. But the precautionary principle applies: when you can eliminate 99% of a potential exposure with better engineering at no cost to performance, why wouldn't you? This is especially important for a device designed to improve your health.

Concerns that sound scary but aren't real

Does infrared cause cancer?

No. Infrared is non-ionizing radiation. It cannot damage DNA. This concern comes from confusing infrared with ultraviolet (UV) radiation, which IS ionizing and does contribute to skin cancer. They are completely different parts of the electromagnetic spectrum. No peer-reviewed research has ever linked far infrared exposure to cancer.

Does infrared cause skin aging?

Some studies have found that near-infrared (not far infrared) exposure may contribute to photoaging in animal models at very high intensities. SaunaCloud uses far infrared exclusively — a different wavelength range with different tissue interactions. Additionally, we integrate red light therapy at 660nm, which has been shown in clinical trials to stimulate collagen production and improve skin appearance — the opposite of aging.

Is it dangerous to use every day?

The Finnish studies showing the strongest health benefits involved 4-7 sauna sessions per week over 20+ years. Daily use is not only safe — it's what the research supports for maximum benefit. The key is proper hydration and electrolyte replacement.

The SaunaCloud safety protocol