Conor McGregor has embarked on Dry January in order to keep a clear head for his rematch with Dustin Poirier.
The Irishman has spent more time building his multi-million-pound whisky business than he has in the cage in recent years.
And he has admitted to sampling his own product during his ill-fated training camp for his clash with bitter rival Khabib Nurmagomedov in 2018.
But as he prepares to take on Poirier later this month, McGregor has gone tee-total.
Alongside a picture of himself training with head coach John Kavanagh, he wrote: "Me and Coach Kavanagh keeping each other away from the Proper Twelve this camp."
McGregor first announced his intention to launch his own Irish whiskey following his defeat by Floyd Mayweather before officially unveiling it a year later.
And having been choked out by Nurmagomedov, McGregor later revealed his preparations had been affected by his drinking.
"I was drinking all bleeding fight week. I had venom in me or something," he said.
"I had people holed up in a hotel and I would ring and arrange a fight, they would come to the gym and have a full-blown fight with no headguards.
"I'd have a war, win and knock the guy out and go off and celebrate and come back in three days.
"I wasn't doing what I should have been doing; I've made mistakes and I've been man enough to admit them."
McGregor returned to the UFC 12 months ago when he stopped Donald Cerrone in just 40 seconds.
He meets Poirier again six years after stopping the American in the first round of their first clash.
Nurmagomedov retains the lightweight title despite announcing his retirement three months ago following his win over Justin Gaethje.
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