clean our ejaculations of microplastics

In the universe of biohacking extreme, Brian Johnson operates in a league of its own. The technological millionaire, known for his ‘Blueprint Project’ which aims achieve eternal youth With funding of two million euros, it has announced a drastic reduction of microplastics in its body, measured in the most intimate place possible. His testicles.

The problem of microplastics. One of the great enemies of today’s society is undoubtedly in the microplastics and the endocrine disruptors that surround us. Bottles, containers, food…they can be a source of this type of elements that can threaten our integrity. And it is something that is currently under investigation, because at the moment it is not known exactly what having a high concentration of microplastics in our bloodstream.

Science has pointed out in the past that in the testicles it was possible to find high levels of microplasticsbut until now we didn’t really know what implications it had. And this is where Bryan Johnson wanted to investigate it within his project to obtain the mechanism to turn back the ‘biological clock’ and calm his doubts about how it affected male fertility.

But this is something very worrying throughout Europe in general, since we live in a time where in Europe

The experiment. How are demonstrations done in science? With clinical trials if done with humans. In this case, Johnson was used as a proper subject in what is called ‘experiment n=1‘. To do this, he analyzed the concentration of microplastics in semen and blood in different periods of time, as mentioned. in a post by X.

In this case, the measurement of microplastics in his semen pointed to the following:

• In November 2024 it was 165 particles per milliliter.
• In July 2025 it was 20 particles per milliliter.

Here you can see a significant reduction in the concentration of microplastics in the semen, but the same thing also happened in the blood with a reduction from 70 to 10 particles per milliliter in a matter of seven months. He had literally managed to ‘wash’ his semen to remove the microplastics from his semen with the aim of improving his fertility.

Beyond the shock initial measure of plastic in semen, Johnson assures that his results offer “new hope” for the detoxification of these contaminants. But what is true in all this? Are we really that contaminated? And does his “cure” make any sense?

Based on science. And it is something that is being investigated right now. Specifically, a meta-analysis of 36 studies published in Environmental Pollutionit was confirmed that microplastics are a clear enemy of male fertility. induce oxidative stress in the reproductive system, which triggers testicular inflammation, cell death and therefore a reduction in testosterone levels that can influence the concentration of sperm per milliliter of semen.

But it doesn’t stay here, it a second study published in Science of The Total Environment analyzed the 23 samples of human testicles (from autopsies) and 47 from dogs. They found microplastics in 100% of the human samples and in all of the dog samples. All of this made Johnson clear about one thing: stay away from all the plastic that would end up in your food.

The detox. But… How do you clean semen? This is the big question that we may all have in our minds (and that we would want to ask if he is right). And although Jhonson himself admits that it is a hypothesis, his team believes that the therapy ‘most responsible’ for this drastic reduction is the sauna.

His protocol is intense: 20 minutes daily at 93°C (200°F), with a peculiarity: “with ice on the testicles” (a common practice to protect spermatogenesis from extreme heat). But this is something that is complemented with other strategies such as:

It’s true? The hypothesis suggests that the sauna is the detoxification system, but now it is time to look for evidence that can contrast it. Right now, in the literature you can find certain articles that try to support this.

In order to see something of a relationship we can go to a 2012 study published in Environ Public Health which confirmed that sauna-induced sweat is effective in eliminating heavy metals such as cadmium or lead and also plasticizers such as bisphenol (BPA) and phthalates.

However, there is a crucial difference: plasticizers are not microplastics. He BPA is a chemical molecule that detaches of plastic; Microplastics are physical particles. Currently, there is no direct scientific evidence that physical plastic particles can be excreted through sweat.

What happened. So, taking all this into account, the obligatory question is this. Johnson’s “detox” is most likely a success of his second strategy: avoidance. By stopping ingesting and absorbing microplastics (thanks to filtered water and not using plastics in the kitchen), your body has had the opportunity to cleanse itself through natural means. The role of the sauna, although plausible for chemicals associated with plastic, it remains speculative for the particles that are the issue in this case.

It is reversible. Beyond the sauna, the most important information that Johnson provides is hope. One of the great fears that one may have in this case is that the contamination was cumulative and irreversible, but based on this data, this is not the case. Although this must be taken with a lot of caution because statistical significance stands out by its absence, as does external validity.

In order to reach a conclusion of this level, a complete study would have to be carried out, protocolized with groups of men formed randomly and respecting the principles of “Randomized Clinical Trials”. And this result may be the first step for science in the field of fertility to try to investigate much more in this regard.

Images | FlyD

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