Logan Paul feared brother Jake would kill himself a few years ago.
Both siblings have made a name for themselves in the world of boxing, with Jake winning six of his seven fights so far.
During his younger years, however, he seemed to struggle with fame..
Jake had his $10million Los Angeles mansion raided by FBI back in 2020, with the authorities then opting against federal charges.
Logan and Jake Paul open up in new Netflix documentary
He also missed out on sponsorship opportunities as a result of his controversies, with the 26-year-old also angering his neighbours by throwing wild parties.
In Netflix documentary series Untold, he admitted: "It's not easy to be hated by the whole entire world. It creates a very dark mental place."
And Logan has now admitted he feared for his sibling.
"Both my dad and I felt worried for my brother's life," he said.
"Jake's always been pretty emotionally unpredictable and volatile.
"There was a point where we were both legitimately concerned that Jake was going to kill himself.
"He needed purpose and I didn't know what he was going to do. What's he good at?"
The Paul brothers then turned to boxing and neither has looked back since, with their popularity growing around the world.
Logan drew with KSI in 2018 before losing the rematch, while Jake was able to beat the British YouTuber's brother Deji.
Jake hasn't fought since losing to Tommy Fury in February but is now set to return to the ring to face ex-UFC star Nate Diaz.
The former YouTuber insists he's now on the comeback trail and is keen to resume his career in boxing.
"I'm back, baby. The comeback starts now, we've got a new team, new mindset, new training schedule," he said.
"And guess what? I'm knocking this motherf****r out."
Also in the new documentary, Jake claims his father, Greg, would be physically violent while growing up.
“My dad would slap the s*** out of me,” states the 26-year-old.
“Our parents were really strict and mainly my dad – it was always Logan and I against him."
In 2021, Jake opened up revealing he'd felt suicidal four years previously after his sibling's controversial video in Japan backfired.
"There was a point where everything went downhill for the Paul brothers, it was after my brother's Japan incident, where no one wanted to work with us," he said at the time.
"Every brand I was affiliated with dropped me, I wasn't even the one who filmed the video. It was just by way of association because my brother filmed in the suicide forest.
"My life was pretty much ruined. YouTube demonetised me, every brand dropped me. I had a $10 million deal with Target that was going to live, they dropped me.
"I'm sitting there at 21 [in 2017], I lose basically all my income because of something my brother did, I'm blacklisted. Everything in my life was falling apart.
"Dark thoughts come into your head of like 'I don't wanna be here on earth anymore.'"