[imtringued]

The reason they failed is because they stopped. For some reason people expect doing something healthy to their body for a few weeks is going to outweigh the years of eating bad food that they will repeat doing after losing weight.

Just look here at this prime example:

"Researchers followed 14 of the contestants from season 8 of The Biggest Loser, including the winner, Danny Cahill, for six years after the show ended. Thirteen of the 14 regained some of the weight back, and four of those gained back what they had lost – and more."

Imagine what would have happened to that person if he didn't go to the biggest loser and just ate the same unhealthy food for 6 years? Do you think he wouldn't have gained 10% more weight? It wouldn't make headlines if he did.

[0] https://people.com/bodies/the-biggest-loser-contestants-perm...