"Beck said that after getting rid of all the pathogens and toxins that your body resets the "body weight thermostat" that controls what your body should weigh"
That completely makes sense to me, and is also backed up by my experience.
I am very slim person, almost to the point of skinny, so I definitely do NOT need to lose any weight...
During the course of my Miracle-Mineral-Supplement protocol I have dumped staggering quantity of feces, that would easily amount to multiple pounds, yet have not actually lose any body weight,
and still weigh about the same as I did before starting with Miracle-Mineral-Supplement .
Aside from the fact, that this could easily constitute a proof, that there is no such a thing as material universe :-) (and it all is an illusion), there seems to be one thing obvious.
As you clear and clean out your body, and thus allow it to return to it's own natural, inherent state of health, the body then uses its own intelligence to regulate the weight to its optimum level.
So you will lose some weight if necessary and at the same token NOT lose it, or even gain several pounds, if that's what is needed for your optimum function.