Days after Rachel Frederickson was crowned the winner of the 15th season of "The Biggest Loser," people are still expressing concern over her dramatic weight loss. The 24-year-old shocked judges for the competitive reality show by revealing she had lost more than 60 percent of her body weight — a decrease of 155 pounds. That amount was not only good enough for the grand prize of $250,000, but also set a record for the largest percentage drop in the show's history. 

Frederickson told reporters that after leaving "The Biggest Loser" ranch she continued to follow the exercise and diet plan created by trainer Dolvett Quince and nutritionist Dr. Cheryl Forberg.

"I worked out a ton and ate super healthy," she said, adding that she keeps a diet of 1,600 calories and eats five times per day. "I followed the advice and support of the medical team.

"I am extremely proud of the way I lost the weight on the show," she said. "I did everything so naturally."

Nevertheless, social media lit up following Frederickson's big reveal, with users expressing concern that she may have taken things too far. 

On Facebook yesterday, Frederickson's trainer Quince finally weighed in, saying: 

"Last night's Biggest Loser Finale has sparked a huge reaction and I do not want the day to end without addressing it," he writes. "Biggest Loser is a journey which has its ups and downs. Please try not to look at one slice of Rachel's journey and come to broad conclusions. Rachel's health is and always has been my main concern and her journey to good health has not yet ended!!"

In an interview with "Today" after her win, Frederickson expressed determination to continue the lessons gained from her time on "The Biggest Loser."

“I’m at the maintenance point now, so I need to find some balance and make sure I work out and I eat healthy and make good choices 90 percent of the time,” she said. “I’m not sure (I’ll maintain this weight), but I plan to try new exercises and just continue on this path and see where that takes me.”

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

'Biggest Loser' trainer responds to shocking weight loss controversy
Dolvett Quince, who coached 'The Biggest Loser' winner Rachel Frederickson, says her health has always been his main concern.