The former heavyweight boxing champ, Mike Tyson credits veganism with helping him lose 140 pounds and getting him in fighting shape.
Tyson told ABC News that he used to eat a lot of meat when he was training for fights. He devoured everything except for pork.
However, he said that as he got older he didn't like the way he was feeling. He had a lot of arthritis, joint problems and was morbidly obese.
It was his wife who influenced him to change his diet.
He decided that's what he wanted to do.
"I was just eating things without even figuring out what they are. And that's how I've been for four and a half years," he said.