You might find this site interesting:
http://eatmore2weighless.com/
Certain people find that their body easily switches into a sort of starvation mode and reduces metabolism if they don’t eat enough calories. That site has some people who are eating twice as many calories (good foods, of course not junk) and working out and they lose alot of fat.
It may be similar to the fact that many people who start consuming “sugar free” products such as diet sodas find that they lose no weight. The sugar free product is just as bad for you as the sugar one. What you need to do is stop consuming the product altogether. In other words, why are you drinking sodas when good old H20 is better for you?
Two of my favorites that opened my eyes
Why we get fat
https://www.youtube.com/watch?v=lDneyrETR2o
And the book ‘eat bacon, don’t jog’