The Longevity Guru Claims His Semen Contains More Microplastics Than His Blood
Perhaps no one has ever told Bryan Johnson: “Don’t give too much information.” The longevity tech guru who dedicates so much effort to has documented his bizarre journey with great sincerity, something that on one hand amazes you and on the other, almost scares you. Johnson has already several times revealed a staggering amount of data about himself, such as admitting that in his effort to slow down the biological clock, he resorted to electroshock to (improve the erections of) his penis. And that he accepted blood transfusions from his teenage son on one occasion.
This week Johnson again provided personal data that no one asked for: his semen has much more microplastics than his blood. On Tuesday in X, he said: “I have microplastics in the product of my ejaculation, 2 times more than their concentration in my blood. +167 microplastic particles in 1 ml of semen +70 microplastic particles in 1 ml of blood. Levels in semen are 238% higher than in blood. That was in November 2024. Compared to my blood, my semen has 239% more microplastics.”
Oh, thank you very much for the information, friend! Sorry, but I have to go wash my ears.
Analysis and Data
Johnson always has his fluids or body analyzed, and seeks to study activities and practices that could give him the key to eternal youth. In this sense, he has positioned himself as a guinea pig while looking for more optimized health regimens, which is admirable, I think, unless he’s a bit insane. Johnson shared some of the results from his analysis: “Since that moment in November 2024, I have managed to reduce the amount of microplastics in my blood by 93%. I will order another analysis of my semen to see if the amount has also decreased there.”
It is true that Johnson points out a problem that concerns us all: in our modern world, we have become so dependent on plastic that it has seeped into our blood (it seems also into semen) and is poisoning us. In his tweets, Johnson cites a meta-analysis published in 2024 that deals with 39 different studies on “the toxicity of microplastics (MP) and nanoplastics (NP) on male reproductive health.” In that study, they found that elevated levels of microplastics in males caused a reduction in testosterone levels, testicular inflammation, and “diminished spermatogenesis at the tissue/organ level.” The study concluded that “lower quality or quantity of sperm was observed, as demonstrated by meta-analysis.”
The accumulation of microplastics in our bodies is something that the scientific community is increasingly trying to warn the public about, although it is frustrating to see that political and regulatory solutions are not keeping pace.
This article has been translated from Gizmodo US by Lucas Handley. You can find the original version.
