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Bryan Johnson is dedicating his life (and $2M a year) to exploring anti-aging technologies and biohacking, which has branched into a focus on the longevity and size of his erections.
On March 25, the tech entrepreneur, 47, took to X (formerly Twitter) with a full breakdown of how prescription drugs, Botox and shock therapy have impacted his penis and erectile wellness.
In his post, he first documented the results of using Cialis or Tadalafil in June 2023. Although the medical drug can be used to treat erectile dysfunction, it can also target symptoms associated with benign prostatic hyperplasia (also known as an enlarged prostate) such as difficulty urinating and painful urination in adult men, cites U.S. government website MedlinePlus.
“I started taking 2.5mg of Tadalafil daily as a longevity intervention and for bladder health,” wrote Johnson, who began collecting data on his penis’ “baseline measurements” two months later under a project titled “Rejuvenating Johnson’s Johnson.”
In August 2023, he calculated his erections lasting over two hours and, based on the International Index of Erectile Function, having a 25/25 score. However, despite using Tadalafil, he discovered that his “sexual function was normal” and not enhanced.
It wasn’t until the following months that Jonhson introduced shockwave therapy and Botox to his routine. While it appears as though amount of time his erections lasted fluctuated (the longest period clocking in at 3 hours and 2 minutes) in August, October and December of 2024, Johnson concluded that his “nighttime erections improved by 34% independent of Tadalafil.” He claims that the Botox and shock therapy lowered his “nighttime erection biological age to around 20.”
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“Many men have told me that posting this all publicly has been the most helpful thing I’ve shared. ED is common, but most don’t talk about it,” he wrote. “Men, if you’re not performing how you’d like, there are many paths to improvement. There’s no shame in this and in fact will make you more of a man to address it head on.”
Jonhson previously explored this study in a Blueprint post titled “How I’m de-aging my penis,” in which he pointed out ways to improve “nighttime erections” and revealed how he measures “penis health” (among the list were semen analyzation and ultrasound-based blood flow testing). In his writing, he prided himself on having “nighttime erections ..the length of [the] Titanic” and his boners clocking in at 3 hours and 14 minutes. The article was an extension of a more in-depth YouTube video posted on February 29, 2024, in which he also details how he quantifies his “sexual function.”
“I’m really trying to improve people’s lives and one day…you’ll appreciate those who watch out for people’s health and wellness,” he said in the clip.
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The tech entrepreneur, who was the subject of Netflix’s documentary Don’t Die: The Man Who Wants to Live Forever, has spent millions of dollars over the past four years implementing the latest discoveries in longevity science to reverse aging and lengthen his lifespan. In the film, Johnson shows the extreme measures he’s taken in his pursuit of extending his natural life, from taking more than 50 pills a day to undergoing the first “multi-generational” plasma exchange with his father and youngest son, Talmage (Johnson has three kids from his first marriage).
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