The effect of bariatric surgery on hypothyroidism: Sleeve gastrectomy versus gastric bypass

LSG and LRYGB both proved to improve thyroid function in hypothyroid obese patients. No procedure was found to be superior. No correlation was found between percentage of excess weight loss and TSH reduction. This implies that the effect of bariatric surgery on the improvement of thyroid functions is mediated by mechanisms other than weight loss, probably hormonal.