The season finale of "The Biggest Loser: No Excuses" went down last night -- and the weight loss Before & After photos are astounding!

The winner, Jeremy Britt, is literally half the man he used to be now. Britt went from 389 lbs. to 190 lbs. -- meaning he dropped 199 lbs., 51% of his original body weight!

Fellow contestant Kim was close behind with a 46% weight loss, while Jeremy's sister Conda came in third -- going from 294 lbs. to 197 lbs., a 39% loss.

Mike Messina nabbed the at-home prize by losing 44% of his body weight after getting eliminated from the show.

The Before & After pictures are just incredible ... they're all winners here. Check out the photos above!

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