After Biggest Loser alum Bob Harper called out Jillian Michaels for not checking in on him following his 2017 heart attack, Jillian reacted to his comments.

The former cohost of the controversial weight-loss competition series shared several decades-old "receipts" intended to refute claims made by cohost Bob Harper and others.

Since the documentary aired, cracks have also begun to show between the show's familiar faces, including Jillian Michaels, and fellow trainer, Bob Harper. During The Biggest Loser's hay day, while ...

Jillian Michaels is working it out in real time ... lose weight using diet and exercise to win cash prizes—was accused of ...

Season 15 winner Rachel Frederickson lost nearly 60% of her body weight, shocking viewers and health experts at the time. Fit ...