
A self-proclaimed biohacker who spends $2 million a year on treatments to 'live forever' has explained how he brought back his '22-year-old' penis.
Bryan Johnson is taking part in a lengthy and intense experimental medical program in the hope of 'reversing aging', and it's safe to say it's been a resounding success so far.
Whether it be following a strict diet, or using his son's blood, Johnson is doing anything possible to remain as young as possible.
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While he may be 47, the biohacker has previously said his crazy experiment helped him achieve the 'heart of 37-year-old' and the 'lung capacity of an 18-year-old'.
Some of the wild things Johnson has done to stay youthful has seen him receive much criticism online, including sharing his and his son's ‘erection data’.

The data included the pair's sleep efficiency, average erection quality, number of erection episodes and total duration.
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Johnson achieved a better average erection quality with 94, while his son Talmage received a slightly lower 90 score.
The biohacker also had much better sleep efficiency but had one less erection episode compared to Talmage.
And after measuring his night-time erections, Johnson believes he has managed to de-age his penis by 15 years.
Speaking to the Mail Online, Johnson said: "It turns out that — this is true for both men and women — that a man’s night-time erections and a woman’s night-time erections – the clitoris engorging — is one of the most important biomarkers of anything about our entire body .
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"So while it kicks up some giggles, it really is one of the most important things for all of us to know about our bodies and it’s just not talked about."
Amongst all the criticism, many were left curious as to how Johnson measured the study, with one person asking: "Did I ask how you track this? I don’t think I have this activated on my Apple Watch."
Amid his ongoing mission to remain young, Johnson gave his then 70-year-old father some of his plasma in what he hailed as 'the world’s first multigenerational plasma exchange'.

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These infusions are typically used to treat a variety of conditions, including liver disease, burns, and blood disorders, rather than for age-reversing purposes.
However, the procedure for reasons such as age reversal is not advised by the FDA.
The authority said in a 2019 statement: "The FDA has recently become aware of reports of establishments in several states that are offering infusions of plasma from young donors to purportedly treat the effects of a variety of conditions.
"The conditions range from normal aging and memory loss to serious diseases like dementia, Parkinson’s disease, multiple sclerosis, Alzheimer’s disease, heart disease or post-traumatic stress disorder."
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They added: "Simply put, we’re concerned that some patients are being preyed upon by unscrupulous actors touting treatments of plasma from young donors as cures and remedies.
"Such treatments have no proven clinical benefits for the uses for which these clinics are advertising them and are potentially harmful."
Topics: Health, Science, Technology