Millionaire biohacker Bryan Johnson has warned that going on holiday overseas can cause “biological wreckage.” The 49-year-old tech entrepreneur shared the warning on X, telling his followers that international travel has invisible effects on the body.
Warning based on personal biomarker data
Johnson stated: “International travel is biological wreckage. It's not my intent to rain on your parade or suggest you not travel.” He added: “I learned first hand from measuring my biomarkers traveling to China, India and Australia. Sharing to be useful in your life decision making.”
The wellness fanatic, known for his extreme biohacking routine in pursuit of living forever, advised people to avoid long trips because of the health consequences.
Social media reactions
Social media users responded to Johnson's advice with a mix of agreement and jokes. One sarcastic commentator stated: “Better to never leave the house. The most optimal.” Another quipped: ”Yeah better stay home and sleep and live three years longer of staying home and sleeping.”
Other X users echoed Johnson's warning, saying long holidays disrupt their sleep schedule and sharing their own experiences. One wrote: “Sleep must be protected at all costs. And long distance flights ruins it big time.” A second stated: “Oh yes I used to have a travel job- 100% travel. It was brutal. Never again.” Another agreed: “Definitely. That's why I did it excessively when I was younger. I can barely handle it now. Only once every few years.”
Johnson's health revelations
Earlier this year Johnson revealed he has been diagnosed with an incurable autoimmune disease, which causes his immune system to mistakenly attack healthy cells in his stomach lining. He announced his intention to “try and solve” the illness, claiming that “AI, multiomics, and custom-built DNA” should mean that no condition is presumed incurable.
One of the most unusual ways Johnson tracks his biohacking journey is by assessing both the speed and the health of his sperm. He claims he has eliminated 95% of microplastics from his semen by spending 20 minutes daily in dry saunas while applying an ice pack to his groin area.
He revealed on X that the concentration of microplastics in his ejaculate plummeted from 165 particles per millilitre in November 2024 to just 20 particles per millilitre in July 2025. “The therapy we think most responsible for this reduction is sauna as it also eliminated most environmental toxins in my body, including those linked to various plastics,” he wrote.
