How much weight do the winners lose?
They lose a lot - 30 to 40 pounds iirc. Medical teams would go out and monitor them periodically. I recall one gal had to be taken off because she had lost so much weight.
Some of the folks would spook after the second sleepless night listening to the wolves and noises in the woods. A lot (most?) of it was psychological. Cold, wet, hungry, dark and alone - and with the push of a button they could be at the lodge that night and home with their loved-ones in a few days.
A quick search found one season’s winner lost 60 pounds in 56 days. He was 6’ 6” and went from a 38” to 31” waist.