She asks: “He gained back a ton of weight and my beautiful son is now officially obese. It seems like his whole metabolism is off from all the different sleep meds that the doctors tried.” What is the cause of this weight gain? What can be done to help?

As you saw intuitively, this was not from medications but was a karmic stirring of the pot because he has been subjected to harassment and attacks within the deep subconscious mind by the interlopers as part of their mistreatment of him, owing to his targeted status. That, in turn, is reawakening old trauma memories of harassment in other lifetimes and that is what is triggering within, a compulsion to eat and indulge himself. It is not simply a hedonistic desire for pleasure but a deep-seated fear that if he does not eat all he can, he will die. That is a karmic legacy of having been starved to death. So the problem is deeper than appears on the surface. This can benefit from both LHP and deep subconscious channeling work.