Tech millionaire Bryan Johnson has made a name for himself for the extreme measures he's taking to reverse ageing.
We're talking about everything from injecting himself with his teenage son's blood to eating mushed up food and going to bed every night at half eight - and all that is wildly expensive.
Johnson reportedly forks out $2 million (£1.59 million) a year on his intense lifestyle - but he's not even first place on the anti-ageing leaderboard.
That's the Rejuvenation Olympics - something Bryan Johnson and his doctor, Oliver Zolman, came up with.
It's basically a place where people can share the methods they're using to reverse their biological age, and the statistics backing up how successful they are.
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Johnson is number seven on the 'relative change' leaderboard - he's 46 years old, but has reported having the 'heart of a 37-year-old', which is pretty good going.
But he's beaten by another American, a retired systems engineer called Dave Pascoe.
Pascoe is 61 years old, and reports an epigenetic age of 37.95 - this is essentially the biomarkers in your body suggesting how vulnerable you are to age-related diseases.
While Johnson spends millions a year to achieve his goals, Pascoe spends only $30,000 (£23,660). Still a lot of money, but nothing compared to what Johnson dishes out.
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Pascoe told UNILAD he realized that some of the more negative aspects of getting older - such as low energy, aches and pains and wrinkles - don't have to be your fate.
"I plainly saw then that [they were] were *very much* avoidable," he said. "I saw that the people who did certain things and didn't do other things always avoided them."
Like Johnson, he has a somewhat wild routine to chase a longer life.
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He takes 120 supplements a day, injects himself with peptides, does plasma donations four times a year and undergoes a semi-annual Hyperbaric Oxygen Treatment, where he breathes pure oxygen in a pressurized environment.
But a lot of it also sounds pretty nice - whether it's spending time in the sauna, watching Netflix, eating two kiwis after dinner or doing his whole-body skincare routine.
And in some ways, his routine is less extreme than Johnson's - he doesn't pay attention to the calories he eats, but just limits simple carbs and make sure he has a varied diet.
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So how has he managed to keep the costs down?
"I don't outsource my health to someone else. I'll do the work myself and gladly pay only for occasional advice as a sanity check," Pascoe said.
"I don't care to measure and know the age of my individual organs. I'm willing to live with some imperfections on my face and skin, [and] I leave no inexpensive well-studied intervention off the table, like sauna, or cold therapy."
He's also worked out a way to save money on the more expensive treatments, like plasmapheresis - which filters out plasma from the blood.
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"Instead of paying $8-10k to have plasmapheresis performed, I do twice weekly plasma donations and they pay me," he told UNILAD.
"In less than five donations, my entire blood volume is filtered, eliminating all of the older damaged proteins. It's a trade off in time, rather than money, but I'm retired now so that's fine by me."
And you can be sure that Pascoe impresses with his youthful looks.
"It's funny when people learn that I'm nearly 62," he said.
"Whether we've just met or they've known me for years, they're always very surprised, and don't believe me at first.
"They immediately assume it's just good luck or genes. I'll explain that it didn't happen by chance, that it's from very intentional lifestyle choices. Then maybe only 1 out of 10 people will even ask what those choices involve.
"However, as soon as it occurs to them that they might have to give up their Diet Coke, for example, they say 'Oh, I'm not doing that!', and then the conversation is over."
But there's a reason Pascoe is doing all this.
"My body is like a prized racehorse, or a cherished high-end performance vehicle," he explained.
"I will only ever get this one, so just like any valued possession, I will invest heavily in its appearance, performance, fuel, care and maintenance. I only wish I knew and applied everything I know now, decades ago!"