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Biohacking · Comparison

Red Light Therapy vs. Infrared Sauna: How They Differ and Which to Choose

Both involve “infrared,” both glow, and both are marketed for wellness — but red light therapy and infrared saunas work in fundamentally different ways.
By Reviewed Updated

Quick answer

What's the difference between red light therapy and an infrared sauna?

Red light therapy (photobiomodulation) delivers specific low-level red and near-infrared wavelengths to skin and tissue without significant heating, aiming to influence cellular processes. An infrared sauna uses infrared heaters to raise your body temperature and induce sweating. Red light evidence is strongest for skin and some recovery outcomes; sauna evidence centers on heat stress, relaxation and cardiovascular-style effects.

Definition

What are red light therapy and infrared saunas?

Red light therapy uses LEDs or lasers at defined wavelengths (e.g., ~660 nm red, ~850 nm near-infrared) and doses. See red light therapy.

Infrared saunas use heating elements that emit infrared radiation (often far-infrared) to warm the body directly, typically at lower air temperatures than traditional saunas.

Why it matters

Why the distinction matters

Marketing often blurs the two. If your goal is skin rejuvenation, heat alone won't replicate photobiomodulation studies. If your goal is heat exposure and relaxation, a red light panel won't raise core temperature.

At a glance

Key takeaways

  • Red light therapy works through light absorption; infrared saunas work through heat.
  • Red light has the best evidence for skin and some recovery outcomes.
  • Saunas provide heat stress associated with cardiovascular-style effects.
  • Some devices combine both, but dosing differs.

Side by side

Red light therapy vs. Infrared sauna at a glance

Comparison of Red light therapy and Infrared sauna
FeatureRed light therapyInfrared sauna
MechanismLight absorption (photobiomodulation)Heating the body
HeatMinimalSignificant
Session length5–20 minutes15–45 minutes
Best evidenceSkin, hair (some devices), recoveryHeat exposure, relaxation
SweatingLittleYes
Home costLower to moderateModerate to high

Which should you choose?

Choose red light therapy if…

  • Your primary goal is skin appearance or targeted recovery.
  • You want short sessions without heat.
  • You have limited space.

Choose infrared sauna if…

  • You want heat exposure, sweating and relaxation.
  • You enjoy a longer wind-down ritual.
  • You're interested in the broader sauna research.

The verdict

They're complementary rather than interchangeable. Choose red light for targeted photobiomodulation and an infrared sauna for heat exposure. Check device specifications and follow safety guidance for both.

FAQ

Frequently asked questions

Can I do red light therapy in an infrared sauna?

Some saunas include red light panels. Be mindful of heat exposure and follow the device guidance for both components.

Does an infrared sauna detox your body?

Sweating removes small amounts of some substances, but the liver and kidneys do the vast majority of detoxification. Detox claims are often overstated.

People also ask

More questions people ask

Is near-infrared the same as far-infrared?

No. Near-infrared (used in photobiomodulation) has shorter wavelengths; far-infrared (common in saunas) primarily produces heat.

Answers

Related questions

Citations

Sources & references

  1. [1]A controlled trial to determine the efficacy of red and near-infrared light treatment in patient satisfaction, reduction of fine lines, wrinkles, skin roughness, and intradermal collagen density increaseWunsch A, Matuschka K. Photomedicine and Laser Surgery, 2014 · Randomized trialView source : A controlled trial to determine the efficacy of red and near-infrared light treatment in patient satisfaction, reduction of fine lines, wrinkles, skin roughness, and intradermal collagen density increase (opens in a new tab)
  2. [2]Association between sauna bathing and fatal cardiovascular and all-cause mortality eventsLaukkanen T, Khan H, Zaccardi F, Laukkanen JA. JAMA Internal Medicine, 2015 · Cohort studyView source : Association between sauna bathing and fatal cardiovascular and all-cause mortality events (opens in a new tab)

Study links open a PubMed search for the exact title, so they keep working even if a journal changes its URL.

Related guides

Keep exploring

Biohacking · GuideRed Light Therapy: How It Works, Benefits and What the Research SaysRed light therapy (photobiomodulation) explained: wavelengths, how it works, what research shows for skin, hair and recovery, how to use it and safety considerations.Biohacking · ArticleRed Light Therapy: What the Research Says (and Doesn't)An evidence-first look at red light therapy: how it works, where research is strongest (skin, hair, recovery), where it's thin and how to pick devices.Biohacking · ComparisonCold Plunge vs. Sauna: Benefits, Differences and How to Combine ThemCompare cold plunges and saunas: physiological effects, research, recovery, safety and how to combine heat and cold (contrast therapy) sensibly.Biohacking · HubBiohacking: Evidence-Informed Tools to Optimize Your BiologyAn evidence-rated guide to biohacking: sleep, light, red light therapy, cold and heat, wearables, hyperbaric oxygen, PEMF and how to run safe personal experiments.Biohacking · GuideCold Exposure: Cold Plunges, Cold Showers and What the Science ShowsWhat cold plunges and cold showers actually do: alertness, mood, brown fat, soreness, training trade-offs, beginner protocols and important safety precautions.Biohacking · ArticleCold Plunge for Beginners: Temperature, Timing and SafetyA safe, step-by-step intro to cold plunging: starting temperatures and times, breathing through cold shock, training timing and who needs clearance.

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