Paul added: “As my dopamine depletes, I spend every day pushing myself, at both non speed and speed quizzing.”
His final tweet read: “And the results have been notable.”
He previously said he would quit The Chase if he began to struggle answering the questions at speed, due to his condition.
“The Chase won’t fire me,” he told Loose Women panellists. “I’ll say, ‘It’s been a lovely journey, you’ve treated me very well, see you later’.”