00:00A simple blood test might one day offer an early clue about cancer risk in men.
00:04A large study led by the University of Western Australia looked at testosterone.
00:09Researchers pooled data from more than 26,000 men across 11 long-running studies.
00:14Blood samples were taken years earlier, then matched with health records over decades.
00:19Men in the lowest fifth for testosterone had an 18% higher risk of dying from cancer.
00:25That held even after accounting for age and other health factors.
00:28Risks started rising when testosterone dropped below 8.6 nanomoles per liter.
00:34Natural testosterone levels were not linked to prostate cancer at all.
00:39Instead, prostate cancer tracked with low levels of two other hormones.
00:43The study appears in Lancet Healthy Longevity.
00:46The researchers stress it shows a link, not proof of cause.
00:49And there's no evidence that testosterone supplements lower cancer risk.
00:54Disclosure.
00:54This video contains stock footage and content created or enhanced using AI-assisted tools.
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