As Reported in the New York Post (23 Oct 2025)
By Tracy Swartz
Tech mogul and self-proclaimed biohacker Bryan Johnson, 48, claims he has managed to remove 85% of microplastics from his semen, marking what he calls a major breakthrough in his ongoing “quest for eternal life.”
Johnson — best known for his multimillion-dollar anti-aging “Blueprint” regimen — said tests showed his microplastic concentration fell from 165 particles per milliliter in November 2024 to just 20 particles per milliliter by July 2025. He attributed this dramatic drop to his daily sauna therapy, which he believes flushed environmental toxins from his body.
“The therapy we think most responsible for this reduction is sauna,” Johnson posted on X, explaining that it also reduced plastic-related toxins in his blood.
His Method: Heat and Ice
Johnson uses a 200°F dry sauna for 20 minutes daily, placing an ice pack over his groin to protect sperm health. Over the same period, he observed a “nearly identical drop” in microplastics in his blood, suggesting systemic detoxification.
He touted the findings as possibly the first documented link between microplastic reduction in blood and semen within the same individual.
However, experts remain skeptical. While saunas do promote sweating, which can remove trace toxins, scientific studies have shown excessive heat can impair sperm count and motility. No peer-reviewed research supports Johnson’s combined “sauna-and-ice” protocol.
Avoiding “Big No-Nos”
Johnson also credits lifestyle changes for reducing microplastic intake — avoiding microwaving food in plastic, using reverse osmosis water filtration, and swapping plastic cutting boards and containers for glass and metal alternatives.
Microplastics — smaller than a grain of rice — have been found in human blood, semen, lungs, placenta, and even the brain. Researchers say these particles may disrupt hormones, induce oxidative stress, and harm fertility.
The Business Angle
Johnson’s company, Blueprint, now sells a US$135 at-home microplastics test kit, marketed as the “first of its kind.” Users prick their finger with a metal lancet to avoid plastic contamination, then mail in a blood sample for lab analysis.
Critics note that Blueprint does not interpret the results, leaving users uncertain about what their numbers mean or how to act on them.
Science Still Catching Up
Microplastics research remains in its infancy, and experts caution that detoxification claims are unproven. While minimizing plastic exposure is advisable, the effectiveness of Johnson’s methods has not been scientifically validated.
Even so, Johnson’s unusual regimen continues to draw attention — part science experiment, part spectacle — as he pushes the boundaries of longevity biohacking.
