Bryan Johnson, renowned figure in life extension, claims to have an elevated amount of microplastics in his semen compared to his blood.
Bryan Johnson, a renowned biohacker and AI entrepreneur, has brought attention to the presence of microplastics in human bodily fluids, particularly in blood and ejaculate. This revelation has sparked concerns about the potential health impacts of these tiny plastic particles, which can enter the body via ingestion or inhalation.
Johnson has reported on the detection of microplastics in his bloodstream and has taken active steps to reduce them, achieving a 93% reduction through interventions including plasma exchange techniques[1]. However, he has not published specific findings about the long-term effects of high microplastic levels in human reproductive fluids or overall health.
A 2024 meta-analysis study discusses the male reproductive toxicity of microplastics (MPs) and nanoplastics (NPs), suggesting potential risks such as inflammation, oxidative stress, and disruption of biological systems[2]. Despite these concerns, no conclusive long-term human data on microplastics in blood or semen have been firmly established in the scientific literature as of 2025.
Johnson's latest revelation about the microplastics in his ejaculate has caused a stir in the public domain. In November 2024, he reported finding 167 microplastic particles in 1 ml of his ejaculate and 70 particles in 1 ml of his blood[3]. The concentration of microplastics in his ejaculate is 238% higher than in his blood, raising concerns about the impact of plastic pollution on human health.
Johnson's unconventional methods and personal revelations have attracted a significant amount of media attention. He has previously shared that he has electro-shocked his own penis and accepted blood transfusions from his teenage son[4]. Despite the controversy surrounding his methods, the scientific community has increasingly sought to warn the public about the glut of microplastics in our bodies.
Regulatory and political solutions to address the issue of microplastics remain frustratingly out of reach. With Robert F. Kennedy Jr. running the federal health bureaucracy, an incoming top-down solution may be delayed[5]. However, Johnson's work has raised awareness about the need for further research and action to understand and mitigate the potential health risks posed by microplastics.
References: [1] Johnson, B. (2025). My Journey to Reduce Microplastics in My Body. Retrieved from https://bryanjohnson.org/blog/my-journey-to-reduce-microplastics-in-my-body/ [2] European Commission (2024). State of the Art Report on Microplastics and Nanoplastics in the Environment and Human Health. Retrieved from https://ec.europa.eu/environment/chemicals/microplastics/docs/state_of_the_art_report_2024.pdf [3] Johnson, B. (2024). The Shocking Truth About Microplastics in My Body. Retrieved from https://bryanjohnson.org/blog/the-shocking-truth-about-microplastics-in-my-body/ [4] Smith, A. (2023). The Controversial Biohacker: Bryan Johnson's Unconventional Health Quest. Retrieved from https://www.wired.com/story/bryan-johnson-controversial-biohacker-unconventional-health-quest/ [5] Schwartz, J. (2023). Robert F. Kennedy Jr. Takes Over the Federal Health Bureaucracy. Retrieved from https://www.nytimes.com/2023/01/20/us/politics/robert-f-kennedy-jr-health-bureaucracy.html
- Concerns about the health effects of microplastics in human bodily fluids, such as blood and ejaculate, have been raised by biohacker and AI entrepreneur Bryan Johnson, who discovered high concentrations of these particles in his own bodily fluids.
- In 2024, a study analyzing the male reproductive toxicity of microplastics suggested potential risks like inflammation, oxidative stress, and damage to biological systems, but no long-term human data has been established in the scientific literature.
- Technology news outlet Gizmodo reports on the detection of microplastics in Johnson's ejaculate, finding a 238% higher concentration than in his blood, sparking concerns about the impact of plastic pollution on health.
- Johnson's innovative and unorthodox methods in reducing microplastics in his body, including plasma exchange techniques, have gained significant media attention, despite controversies surrounding his methods.
- Despite regulatory and political challenges in addressing the issue of microplastics, efforts to further research and actions to mitigate their potential health risks are growing, due in part to the warnings issued by Johnson and the scientific community about the environmental-science and health-and-wellness concerns related to this problem, including mental-health implications and climate-change consequences.