American tech entrepreneur and anti-aging influencer Bryan Johnson, known for spending millions every year to reverse his biological age, claims that at 48, many of his vital health indicators resemble those of an 18-year-old. Johnson, who runs longevity start-up Blueprint, credited strict sleep habits, nutrition, exercise and eliminating “bad habits” for what he calls the “80/20” of his regimen.
Johnson shared a detailed list of his biomarkers on X, writing: “I’m 48, but in many ways my body runs like an 18-year-old… If you’re in a good place, keep going. If you’re struggling, take the first step; it’s always the hardest and always worth it.”
He listed several metrics that he says fall into the upper percentile ranges for men and even teenagers, including:
- Muscle: 98th percentile
- Body fat: optimal 98th percentile
- Bone mineral density: 99th percentile across all age groups
- Resting heart rate: equivalent to an elite athlete
- Fertility and sexual function: upper 99th percentile
- Blood pressure: lower than 90% of 18-year-olds
- Vascular function: similar to late adolescence
- Glucose and blood sugar control: better than most 18-25 year olds
- Sleep metrics: comparable to 18-29 year olds
- DNA biological markers of age: telomere age between 10-15 years
He also highlighted grip strength in the top 5% across all age categories and listed several other indicators that he claims outperform much younger adults.
Internet reactions: “Bio markers won’t make you 18”
Johnson’s post quickly went viral, drawing both admiration and skepticism.
One user wrote: “You may not have figured out how not to die, but you have shown what it means to be biologically 1% human.”
Another questioned the comparison, asking: “That’s amazing, but does your body really run like an 18-year-old?”
A third chimed in more critically: “Just because biomarkers say you’re 18 doesn’t make you 18. Get in a boxing ring with a fit 18-26 year old and the difference will show… and that’s okay! Life is precious because it’s temporary.”
Johnson’s Recent ‘Magic Mushrooms’ Experiment
Johnson regularly made headlines for his unconventional longevity practices. Last week, the 48-year-old revealed that he took a five-gram dose of magic mushrooms as part of his research into aging and brain health.
He shared his experience on X, writing: “Yes, this trip changed me… People assume I’m afraid of death. I’m not. In my darkest days of depression, I came to terms with death.”
He added that he would share more when he had time to reflect on the experience.
Johnson’s experiments with extreme longevity continue to fuel fascination and debate on the Internet, with supporters praising his dedication and critics questioning the limits of biological “twisting.”
