Is male testosterone in freefall? – podcast

Jul 09, 2026 - 05:05

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Is male testosterone in freefall? – podcast

Men’s average testosterone levels have halved over the past 50 years, according to scientists who say society is facing a male fertility crisis. Rising levels of obesity and diabetes are expected to play a part, but the team behind the work suggest that environmental factors such as endocrine-disrupting chemicals – which can be found in various household items – and global heating could also be factors in the apparent striking decline. Ian Sample speaks to science correspondent Hannah Devlin to find out how the work has been received and what the researchers want to see happen in response to their finding

Men’s average testosterone levels have halved in last 50 years, say scientists

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