technically there is no rebound effect as you would see when using Femera for estrogen, but when you taper down that is supposed to MINIMIZE the down reg of your thyroid levels, it really all depends on how well your body can convert that and use it really. I run my T3 cycles at no more than 100mcg and for usually 3-4 months with a 1 month break and everytime I get my thyroid tested its always a tad bit below average, but I usually get this done approx 2 weeks after stopping a 16 week cycle, so I wouldnt worry about that at all, judge how you look when you start tapering down, that will tell you everything, of course when you come off you will notice yourself not as tight or lean but once your levels return to normal as they ALWAYS will (unless you have a thyroid problem in the first place) you will see that go away....