Our thyroid supposedly makes around 30mcg/day. I can only talk from using T3 for cutting fat, but less than 50mcg didn't make a difference for me. Have you pulled the sugar out of your diet to see if you start dropping?
Yes, sugar restricted. As I said, weight loss was doing well, dropping 30 lbs before stalling.
I added the 25 mcg T3 to the prescribed 2 grains of NDT that I have been taking for a long time with my TSH staying around the 4 to 5 range. The NDT provides 76 mcg T4 and 18 mcg T3, for a total of 43 mcg of T3 a day. Hopefully it will drop my TSH under 2.5, as it has never done it with the DR prescribed meds.
This seems to be helping with dropping off the weight again. So far so good.