I've been taking the stuff for years and have lost muscle and weight, so much so that I can barely walk. I can't imagine how it could cause weight gain, especially that much in just one week.
Is there anything else you added or changed during that period? What else are you taking in relation to the TMG?
Interesting. There must be other things that we're doing differently, as all these supps interact, and may be playing a factor, especially since TMG is involved indirectly with methylation.
Stupid question perhaps, but do you have ME/CFS? Or did you have it, but you're recovering nicely? That's great you can exercise.