'The Biggest Loser' - Season 15

"The Biggest Loser" contestant Rachel Frederickson is the winner of Season 15. Click through the gallery for a look at the before and after pictures of each contestant.

( Trae Patton / NBC )

"The Biggest Loser" contestant Rachel Frederickson is the winner of Season 15. Click through the gallery for a look at the before and after pictures of each contestant.

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