[Digital Today reporter Jinju Hong (홍진주)] Tech entrepreneur Bryan Johnson, known for longevity experiments, unveiled 41 health-management principles he says he gained after spending millions of dollars. His conclusion after experiments involving massive costs was surprisingly simple. He said basic habits that anyone can follow are key, such as enough sleep, regular exercise and a healthy diet.

Business Insider reported on May 14 that Johnson recently posted his 41 longevity principles on X, formerly Twitter, alongside the message: "This is all. Everything I learned spending millions on longevity."

He organised the guidelines around sleep, exercise, diet and avoiding risky behaviour. He put sleep first. Calling it "the most powerful drug in the world," Johnson recommended going to bed at the same time every day and staying in bed for at least 8 hours.

The list largely tracked familiar health rules. It urged regular exercise, healthy food and avoiding actions that can shorten lifespan. The outlet said the core of Johnson's longevity strategy, built with millions of dollars, was more accessible and less costly than expected.

Many of Johnson's extreme experiments were not included in the newly released principles. Johnson, 48, runs an anti-ageing programme called Project Blueprint that costs about $2 million a year, or about 3 billion won. He has claimed that, with medical staff, the programme has rolled back his heart to the level of a 37-year-old, his skin to 28 and his lung capacity to 18.

His daily regimen is also far stricter than typical health management. Johnson has his first meal at 6 a.m. and finishes his last meal at 11 a.m. He limits total daily intake to 1,977 calories and said he spends about $44.91 a day on food and about $11.24 on supplements. Supplements he takes include zinc, turmeric and lithium.

He also exercises every day. He has said he works out for 45 to 60 minutes a day and focuses on slowing the pace of ageing and maintaining overall health, rather than improving records or building muscle. His routine cycles through moderate-intensity cardio, high-intensity interval training (HIIT) and 30 familiar strength exercises.

Johnson continued various longevity experiments until recently. In November last year, he conducted an experiment that measured physical and mental responses after taking a high dose of psilocybin mushrooms. Such extreme attempts were not included in the 41 recommendations.

Johnson described himself as an "immortal uncle and aunt" and wrote that the list was "for our immortal nieces and nephews."

In the market, some see the disclosure as aligning with public awareness of the longevity industry. While advanced technology, expensive treatments and various experimental attempts draw attention, there was renewed assessment that the core principles ultimately converge on basic daily management such as enough sleep, exercise and a healthy diet.