Claim: Using saunas once a week reduces risk of death from any cause by 30 to 40%, maybe even more. Use of saunas three times a week reduces this a further 30 to 40%.
Fact-check: Saunas not proven to reduce risk of death - Full Fact
Verdict: this may be referring to a finnish study which found an association between sauna use four to seven times a week and a 40% reduced risk of death compared to using saunas once a week. but the study did not compare with people who don't use saunas, and cannot be used as evidence that saunas themselves caused a decrease in risk of death.
Organisation: Full Fact
Author: Dr Fergus Brown
Date published: 2023-04-14T00:00:00