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PeakMetrics / Fact Checks

Health & medicine fact checks

Explore claims publishers have checked about health & medicine. Read their original ratings and follow the evidence.

13,666 published reviews in this topic

First CheckHealth & medicine

Wearing a tight underwear lowers a man’s sperm count

Publisher’s rating: True. However, its link to infertility remains uncertain

The review reports that tight underwear can raise testicular temperature and may affect sperm quality and production. It says the direct link between this temperature increase and infertility remains uncertain.