Forget running the UFC ... Dana White now looks like he could straight-up compete in the fighting org. -- and he says it's all 'cause of an 86-hour fast he did this week.
The 54-year-old revealed in a video on his social media page Wednesday night that he began his fast after UFC 295 on Saturday night ... and just a few days later, he's seen incredible results.
White explained in the clip that he began the no-food streak by doing nothing more than drinking water with electrolytes for 24 hours.