Did "The Biggest Loser" lose too much?

That's what some fans of the NBC reality show are claiming after watching winner Season 15 champ Rachel Frederickson on Tuesday night's live finale.

Frederickson, 24, started the season weighing 260 pounds. During the finale, she weighed in at a mere 105 pounds, having lost nearly 60 percent of her body weight since the show began filming late last summer. With her victory, she captured the show's $250,000 grand prize.

"I came here to gain back my life, and I did exactly that. I've found that proud, confident girl that has so much respect for herself," she told People magazine backstage after the show.

Rachel Frederickson during ’The Biggest Loser’ on February 4, 2014.
Rachel Frederickson during 'The Biggest Loser' on February 4, 2014. (Trae Patton/NBC)

But her dramatic tranformation has caused many to wonder aloud on social media whether she took things too far and too fast. Some described her as looking "anorexic," "sickly" or "gross." And in a comment echoed by others, a fan on Twiiter said, "Rachel's 60 percent weight loss is nothing to celebrate. Biggest loser should be ashamed."

Meanwhile, a commentor on EW.com wrote, "This made me so sad. Rachel looked beautiful at 150 pounds. I expected her to end up in the 120s. The girl who came out last night looked frail and sick, not like an athlete."

NBC has issued no immediate comment.

Frederickson, a native of Stillwater, Minn., came into the show with a sad backstory. She was a competitive high school swimmer who gave up a full college scholarship to follow her boyfriend to Europe. The relationship ended, and a heartbroken Frederickson returned home where she began binge eating to offset her sorrows. She said she gained 100 pounds over the next six years.

What do you think of "The Biggest Loser"? Did Frederickson go too far? Or do you admire her dedication and competitive spirit?

Contact Chuck Barney at Facebook.com/BayAreaNewsGroup.ChuckBarney, or Twitter.com/chuckbarney