well, its perfectly normal to drop 10lbs if you jump from a high carb to a low carb diet...
so thats got nothing to do with the t3 per se, it just speeds anything up really.
i also find that the higher the t3 dose the less carbs are stored and the more carbs i can eat and still be in ketosis...
up to the point where you NEVER seem to store ANY glycogen at all anymore at doses of >150 mcg.
very comparable to DNP in this regard, but it doesnt make you watery, just insanely FLAT to the point you look like you dont even lift.
the rebound is insane though. within 2-3 weeks after coming off high doses t3 (best thing would be to start a blast right there) you look like a COMPLETELY different person once you filled out again. even though you look like shit on high doses of t3 the transformation afterwards is incredible.