Effect of Roux-en-Y gastric bypass on thyroid function in euthyroid patients with obesity and type 2 diabetes

The present study is the first to show that both serum levels of FT4 and TSH decrease after RYGB in euthyroid patients with obesity and type 2 diabetes. Our results suggest that not only can RYGB improve metabolic abnormalities, but it may also alter the feedback regulation of the thyroid system.