Bryan Johnson· Author
Two studies last year showed that microplastics were detected in every human testicular and semen samples tested.
Loading…
The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
Two studies last year showed that microplastics were detected in every human testicular and semen samples tested.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
Earlier last year, a study made headlines by reporting high levels of microplastic particles in the testicles of deceased humans and dogs. Microplastics were positively detected in every tested sample at average concentrations of 328.44 µg/g and 122.63 µg/g, corresponding to approximately 5.9 x 10¹¹ and 2.2 x 10¹¹ micro- and nanoplastic particles per gram of testicular tissue (1µg ≈ 1.8 x 10⁹ particles).