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Bryan Johnson schools MrBeast after YouTuber said he works 15 hours a day with little sleep

This, however, is not the first time that the anti-ageing millionaire has stepped in to offer health advice to others on social media. In May, he sharply criticised a viral social media post by an Indian web developer that appeared to glorify working through the night.

July 01, 2025 / 12:40 IST
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Anti-ageing millionaire Bryan Johnson and YouTube sensation MrBeast (aka Jimmy Donaldson) (Image credit: Bryan Johnson, AFP)

YouTube sensation and newly minted billionaire MrBeast (aka Jimmy Donaldson) has given fans a glimpse into his relentless work ethic, claiming to be averaging 15 hours of filming daily. His candid admission on X about sacrificing sleep for content led tech entrepreneur and anti-ageing advocate Bryan Johnson to school him about how he needs nourishment to keep him "vibrant and durable".

“I’m probably averaging 15 hours a day of filming this month and getting less sleep than I ever have in my life (I didn’t even get to go to bed last night ) BUT my god these videos are the greatest content I’ve ever filmed,” MrBeast, reportedly the world's youngest self-made billionaire at 27, shared on X.

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Donaldson, who started his YouTube journey in 2012 and found viral fame with ambitious videos like "I Counted to 100,000," famously dropped out of college to focus on his content, reinvesting earnings to fuel increasingly grand projects.

Responding to MrBeast's post, Johnson, known for his focus on anti-ageing, offered a word of caution and advice. "Jimmy, in time you’ll transition into making content battling the ideas of society. Be sure to properly nourish yourself now so that you’re sufficiently vibrant and durable then," he wrote.