Bryan JohnsonFounder of Blueprint and Don't Die

I reduced microplastics in my sperm by 85%

10 Dec 2025 · 1 min

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1:14

In this video, Bryan Johnson reports a personal experiment in which he measured microplastic particles in his semen, finding an initial concentration of 165 particles per milliliter. After following a daily regimen of a 200 °F dry sauna for 20 minutes combined with targeted cold exposure to the testicles, he re‑measured eight months later and observed a reduction to 20 particles per milliliter—an approximately 85 % decrease. Johnson explains why microplastics in the male reproductive system are concerning, citing oxidative stress, testicular inflammation, cell death, reduced testosterone, and lower sperm counts. He references two recent studies that detected microplastics in every semen sample examined, underscoring the ubiquity of the problem. While he suggests the sauna‑cold protocol may be responsible for the observed detoxification and possibly for reducing other environmental toxins, he emphasizes that the evidence is not conclusive and calls for further investigation.

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Listen up, guys. Microplastics are in your balls. And I can help. I successfully reduced microplastics in my sperm by 85%. This is gigantic news in the world of balls. Last year, I measured 165 microplastics per milliliter in my balls. Just eight months later, that number dropped to 20. Why does this matter? Microplastics don't just sit in your body. They wreak havoc. Oxidative stress, testicular inflammation, cell death, lower testosterone, lower sperm count. Basically everything you don't want happening to your balls. Last year, two studies showed microplastics were detected in every single sample from balls and semen. Every single one is crazy. Can we get rid of these things? Based upon my data, it appears reversible. And the therapy? Likely doing the heavy lifting. The sauna, 200°F, 20 minutes a day, dry sauna, ice on the boys. In fact, we think it's possible this therapy was also responsible for reducing environmental toxins inside my body as well. It's not conclusive evidence, but it strongly suggests that the right sauna protocol could reduce microplastics in the body. Don't die. Sperm just level up.