I am 2.5 years post op from gastric bypass and 11 years out from total thyroidectomy due to cancer. I initially lost 173 pounds after RNY. and about 1.5 years out started with significant regain. Discovered my tsh level was through the roof so I had no metabolism. Had to significantly increase my synthroid. Now I am back where I should be and trying to relose 85 pds. So disheartening. Anyone else had issues with being synthroid dependent and regain of weight?