Jillian Michaels and Bob Harper — longtime trainers on “The Biggest Loser" — appeared inseparable on screen, but behind the scenes their friendship fell apart.

Carla Triplett made The Biggest Loser history when she appeared on the show’s seventh season in 2009 at 379 pounds — the heaviest for a contestant at the time.

“Caffeine was NEVER banned on The Biggest Loser,” Michaels wrote in the caption.