I had my thyroid and para thyroids removed three years ago and just had a sleeve done with no issues. I only take 175 with no thyroid at all. My tsh, t3, and t4 have been good for a long time. I am fortunate enough to have a very recognized endo. The hardest part was getting dialed in, he said it takes over a year and it did. The biggest help was taking the meds at the same time everyday on an empty stomach and not consuming anything for at least a half hour. And he will not let me take generic, said most people will not be steady on generic. Because different manufacturers have different fillers.