Health claim
“Heat exposure from frequent sauna use or tight underwear can temporarily lower sperm count.”
Claim checked — strong evidenceLow riskother
Evidence Summary
Multiple well-designed studies consistently support this claim.
Scientific studies show that elevated scrotal temperature from frequent sauna use or wearing tight underwear can transiently reduce sperm production and count, with effects typically reversible after a few weeks.
Extracted from
Why Male Fertility Is Declining Drastically | Dr. Shanna Swan & Dr. Andrew HubermanHuberman Lab Clips
Dr. Shanna Swan and Dr. Andrew Huberman discuss the documented decline in male sperm counts, its potential health implications, and factors that may influence fertility.
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