/ Research Lab · The evidence

The sauna science library.

Every wellness claim made by sauna brands, mapped to the actual published research — and graded on evidence strength from A to F. No pay-to-rank placements, ever: a site that tells you what is false is honest.

8Claims indexed

11Studies cited

100%Citations link to PubMed

A–FEvidence grades

AStrong evidenceMultiple RCTs or large prospective cohorts

BGood evidenceSmall RCTs or consistent observational

CSome evidenceLimited data, plausible mechanism

DWeak evidenceTrace findings, no clinical significance

FDebunked / no evidenceClaim not supported by literature

“Saunas detox heavy metals from your body”

Weak evidence · 2 studies · infrared, traditional

Trace amounts of arsenic, cadmium, lead, and mercury have been detected in sweat, but concentrations are negligible compared to urinary and fecal excretion. No clinical evidence that sauna meaningfully reduces total body burden.

⚠ CaveatMarketing language around “detox” often overstates this thin evidence. The liver and kidneys handle the vast majority of heavy-metal elimination.

Journal of Environmental and Public Health · 2012 · PMID 22505948 Arsenic, cadmium, lead, and mercury in sweat: a systematic review Finding: Detected in sweat but clinical significance unclear Archives of Environmental Contamination and Toxicology · 2011 · PMID 21057782 Blood, urine, and sweat (BUS) study: monitoring and elimination of bioaccumulated toxic elements Finding: Some toxic elements measurably excreted in sweat; urine remains the dominant route

#detox#heavy metals#marketing

Browse saunas for general wellness (not “detox”) →

/ MethodologyClaims are graded with a GRADE-framework-adapted rubric, and every citation links to PubMed so you can verify it yourself. Seed grades are provisional pending expert review. Read our full methodology.

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/ Learn the languageFrom löyly to low-EMF: every sauna term explained in the glossary. Popular myths get their own verdicts in the Myth-Buster.