Mockery, dangerous weight loss practices and long-term health impacts — “The Biggest Loser” was a TV phenomenon that shaped how Americans view weight.

For years, Bob Harper and Jillian Michaels appeared to have great chemistry onscreen while filming "The Biggest Loser" together. But a new docuseries about the NBC weight-loss competition has fans wondering if the dynamic duo actually got along in real life.

This The Biggest Loser contestant did some deep reflection on her time in the show. Joelle Gwynn was one alum of the NBC reality show who appeared on Fit for TV: The Reality of The Biggest Loser, and she revealed her scathing thoughts on one of the coaches who berated her.

Tracey Yukich tells Fox News Digital that she learned a lot about herself on the show. Yukich appears in the new Netflix documentary "Fit for TV: The Reality of the Biggest Loser."