Selenium is not very beneficial for thyroid nodules and there is no definitive clinical evidence that selenium is useful in the treatment of thyroid nodules. In clinical practice, selenium yeast tablets are generally used to supplement selenium, which is more effective for some selenium deficiency diseases. Selenium has good antioxidant properties, can improve human immunity, improve cardiovascular circulation, increase resistance, but these effects have no direct significance for the treatment of thyroid nodules. Therefore, in general, for the treatment of thyroid nodules, you should actively go to the hospital for ultrasound examination to determine the size and nature of the nodules, and then decide on the appropriate treatment according to the specific circumstances. And selenium does not have much benefit for thyroid nodules.