Originally Posted by
OBoile
Actually it is true for everyone. Hormones or whatever don't magically turn people into perpetual motion machines.
Nope.
Insulin resistance, excess insulin in the system = fat storage. Fat storage at normal/maintenance calorie levels, even with caloric restriction, fat storage occurs. More fat storage = higher levels of insulin resistance which equals more fat storage and more insulin resistance... and so on and so on. And once insulin resistance overcomes the ability for the body to process sugar/carbs - more fat storage.
Not only do some people require less calories to lose weight because of hormones, they also require less types of certain foods.
I can tell you without a shadow of a doubt- If I keep calories the same but switch diet type, increase carb intake - I will gain weight at a significant rate.