Jillian Michaels responds to Netflix's "Biggest Loser" documentary allegations, considering legal action while calling the series lies and discussing her side of the story.

As The Biggest Loser trainers Jillian Michaels and Bob Harper each publicly weigh in on their complicated relationship, we're doing a check-in with all 18 winners from the competition series.

Dr. Robert Huizenga fired back at Jillian Michaels ’ claims after she accused those involved in the new Netflix documentary, Fit for TV: The Reality of the Biggest Loser, of lying about the use of caffeine pills on the show.