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Male Testosterone Halved Globally, Sparks Fertility Product Frenzy

7/12/2026

30 4 Full Breakdown

Summary

Story summary

The report has sparked alarm over a surge of unverified male-fertility products marketed online.
Researchers led by Professor Hagai Levine say average male testosterone has fallen about 50% worldwide in the past five decades.
Scientists link the decline to rising obesity and diabetes rates.
Start-ups such as Paterna are testing lab-grown sperm and AI-driven selection as potential clinical solutions for low-fertility men.

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Story summary

The report has sparked alarm over a surge of unverified male-fertility products marketed online.
Researchers led by Professor Hagai Levine say average male testosterone has fallen about 50% worldwide in the past five decades.
Scientists link the decline to rising obesity and diabetes rates.
Start-ups such as Paterna are testing lab-grown sperm and AI-driven selection as potential clinical solutions for low-fertility men.