Famed biohacker Bryan Johnson is giving new meaning to the term “sperm washing.”

Sperm washing is a lab technique that isolates healthy, active little guys from seminal fluid and debris for use in fertility procedures like intrauterine insemination (IUI) and in vitro fertilization (IVF).

As part of his quest for eternal life , Johnson said he has now found a way to improve the quality of his swim team by removing microplastics — those tiny, ubiquitous fragments that slough off larger plastics as they degrade. 4

The concentration of microplastics in Johnson’s ejaculate dropped from 165 particles per milliliter in November 2024 to 20 particles per milliliter in July 2025, he revealed this week on X .

“The therapy we think most responsible for this reduction is sauna as it also

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