Bryan Johnson is the millionaire tech genius who is trying to reverse the aging process.
The goal, he says, is to 'make death optional'.
When did Bryan's biohacking journey begin?
Born in Utah, US, Johnson was just 20-years-old when he founded Braintree, a payment gateway that lets customers pay merchants using credit cards, debit cards, PayPal, PayPal Credit, and digital wallets like Apple Pay, Google Pay, and Venmo.
In 2013, the company was sold to PayPal for a whopping $800million (£642million).
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By becoming a very rich man, the 'biohacker' has decided to embark on the journey he claims no other human has successfully been on, and that is to stop dying. Watch below:
What does being a biohacker involve?
For the past few years, the 46-year-old has started a longevity project called Blueprint, which is an 'algorithm' for preserving his body.
This includes swallowing 100 pills a day, not drinking alcohol, practising veganism, all while taking blood tests and undergoing colonoscopies every month - racking up around $2million a year in the process.
Bryan is very open about his transformation over the years, with him even sharing an 'unrecognisable' photo of himself before he switched to this controversial lifestyle.
In an interview with TalkTV's Piers Morgan, Bryan said: "My day consists of 100 activities we've designed throughout the past two years. Every activity I do is based on scientific evidence.
"The first thing I do in the morning is take my waking air temperature. I then weigh myself looking at fat, muscle, bodyweight, and hydration.
"I drink a concoction called the green giant, take 57 pills, work out for an hour, then have red-light therapy on my hair. I eat my breakfast which is a few pounds of vegetables, then I'm ready for my day."
In the process, he claims to now have the heart of a 37-year-old, the skin of a 28-year-old, the lung capacity and fitness of an 18-year-old, and the gum inflammation of a 17-year-old.
Why does he practise such a vigorous lifestyle?
The real reason why he wants to go through such an intense process is so he 'doesn't die'.
"The goal is don't die," he said this week when being interviewed by Good Morning Britain.
"We are currently in the midst of the biggest transition of our species, where we're going from death being inevitable to having some unknown horizon of how long and how well we can live.
"And I'm the first example of that in the world."
He also enjoys the lifestyle.
Johnson - who has been open about going through depression after his divorce - told GQ: “I guess it depends on how you define hard. I personally find it a tremendous joy.
“I derive tremendous pleasure from the entire process of what we're trying to do. Pioneering the cutting edge of science and showing the future of human possibility.
"It's funny, because most people hear about this, and the instantaneous reaction is to assume that I must be miserable.
"It's very hard to understand that I might derive more pleasure from doing this than I would anything else.”
“I've never felt greater stability,” he says.
“Emotionally, I don't think I've ever been able to make better judgments. My mind has never been as clear. So there are a lot of benefits there.”
Topics: Science, Technology, Health
Anish Vij